Prior art

For US Patent 11192568, titled "Removable seat attachment for a stroller," the prior art citations provide context for the invention. A comprehensive anticipation analysis under 35 U.S.C. § 102 would require a detailed claim-by-claim comparison of US11192568 against the full disclosure of each cited prior art reference. However, based on the titles and general subject matter, the following patents are cited as prior art in US11192568, according to information available on Google Patents:

I. Internal Priority Documents (Same Patent Family)

These patents are part of the same patent family as US11192568, indicating a continuous chain of applications covering similar subject matter. They represent the evolution of the claimed invention.

1. US9944305B2

   • Full Citation: US9944305B2, Lee Jon Hee et al., "Removable seat attachment for a stroller"
   • Publication/Filing Date: Publication: 2018-04-17. This application claims priority to earlier applications, including Provisional Application No. 62/311,224 filed Mar. 21, 2016.
   • Brief Description: This patent describes a removable seat attachment for a stroller, aiming to convert a single stroller into a multi-seat stroller. It is a direct parent application to US11192568.
   • Potential Anticipation: As a direct parent application, US9944305B2 likely discloses many of the features claimed in US11192568. A full anticipation analysis would determine if any claims in US11192568 introduce new subject matter not fully disclosed or enabled by the earlier filing date of US9944305B2. Claims relating to the general concept of a "removable seat attachment for a stroller" and methods of converting a single stroller to a multi-seat stroller (such as Claim 1 and Claim 16 of US11192568) are broadly covered.

2. US9403550B2

   • Full Citation: US9403550B2, Lee Jon Hee et al., "Removable seat attachment for a stroller"
   • Publication/Filing Date: Publication: 2016-08-02. This application claims priority to earlier applications, including US Provisional Patent Application No. 61/119,920 filed on Dec. 4, 2008.
   • Brief Description: This patent describes a removable seat attachment for a stroller, providing means to convert a single stroller into a double stroller.
   • Potential Anticipation: Similar to US9944305B2, this patent is part of the priority chain and covers the core invention. Features related to stroller frames, attachment points, and removable seats would be highly relevant to claims like Claim 1 and Claim 16 of US11192568.

3. US8955869B2

   • Full Citation: US8955869B2, Lee Jon Hee et al., "Removable seat attachment for a stroller"
   • Publication/Filing Date: Publication: 2015-02-10. This application claims priority to earlier applications, including US Provisional Patent Application No. 61/119,920 filed on Dec. 4, 2008.
   • Brief Description: This patent describes a removable seat attachment for a stroller, facilitating the conversion of a single stroller into a multi-seat configuration.
   • Potential Anticipation: As another patent in the priority chain, it is highly likely to disclose many aspects of removable seat attachments and convertible strollers, potentially anticipating elements of claims like Claim 1 and Claim 16 of US11192568 related to the functional aspects of seat attachment and stroller conversion.

4. US20100140902A1

   • Full Citation: US20100140902A1, Lee Jon Hee et al., "Removable seat attachment for a stroller"
   • Publication/Filing Date: Publication: 2010-06-10. This application claims priority to US Provisional Patent Application No. 61/119,920 filed on Dec. 4, 2008.
   • Brief Description: This published application describes a removable seat attachment for a stroller.
   • Potential Anticipation: As an early publication in the same family, this document is highly relevant. It would likely anticipate general concepts of removable seat attachments and stroller conversion found in claims like Claim 1 and Claim 16 of US11192568.

II. External Prior Art Documents

These patents disclose various stroller systems, seat attachments, and related accessories. A thorough 35 U.S.C. § 102 analysis would examine whether any single reference explicitly or inherently discloses every element of a claim in US11192568.

1. US20080277884A1

   • Full Citation: US20080277884A1, Hartenbach Mark H, "Child transport system"
   • Publication/Filing Date: Publication: 2008-11-13.
   • Brief Description: This document likely describes a child transport system, which could include strollers with various seating configurations or modular components.
   • Potential Anticipation: Any claims in US11192568 broadly directed to stroller systems or child transport systems with convertible seating or attachment points could be potentially anticipated by this reference.

2. US20090267323A1

   • Full Citation: US20090267323A1, Ogle Benjamin S, "Accessory for a stroller"
   • Publication/Filing Date: Publication: 2009-10-29.
   • Brief Description: This document describes an accessory for a stroller, which could be a seat, storage, or other add-on feature.
   • Potential Anticipation: Claims of US11192568 that relate to general "attachments" or "accessories" for a stroller, or methods of coupling such items, may find relevance in this prior art.

3. US6974152B1

   • Full Citation: US6974152B1, Hunter, Scott, "Stroller having child's seat adapter"
   • Publication/Filing Date: Publication: 2005-12-13.
   • Brief Description: This patent describes a stroller featuring an adapter for a child's seat, suggesting modularity or the ability to attach different types of seats.
   • Potential Anticipation: This patent is highly relevant to the concept of attaching secondary seats. Claims of US11192568, such as Claim 1 and Claim 16, that involve a stroller frame configured to receive a seat attachment adapter for supporting a second seat, could potentially be anticipated by similar disclosures in US6974152B1.

4. US6644675B1

   • Full Citation: US6644675B1, Chuang Kuo Feng, "Foldable stroller"
   • Publication/Filing Date: Publication: 2003-11-11.
   • Brief Description: This patent focuses on a foldable stroller.
   • Potential Anticipation: While US11192568 mentions folding mechanisms (e.g., in the description of stroller 10 in FIG. 1), the core claims of US11192568 are more about seat attachments. Therefore, this reference primarily impacts claims related to the stroller's foldability rather than the specific seat attachment and housing features.

5. US6283489B1

   • Full Citation: US6283489B1, Laitenberger, Charles, "Multi-function stroller"
   • Publication/Filing Date: Publication: 2001-09-04.
   • Brief Description: This patent describes a multi-function stroller, implying versatility in use, possibly including different seating configurations.
   • Potential Anticipation: Any claims in US11192568 that relate to the multi-functional aspect of a stroller or its ability to accommodate multiple children through various configurations could be relevant.

6. US6120047A

   • Full Citation: US6120047A, Laitenberger, Charles, "Transportable child's seat"
   • Publication/Filing Date: Publication: 2000-09-19.
   • Brief Description: This patent describes a transportable child's seat, which could be used with a stroller or independently.
   • Potential Anticipation: Claims of US11192568 that describe the characteristics of the seat itself (as opposed to the attachment mechanism to the stroller) might find relevance here.

7. US6010156A

   • Full Citation: US6010156A, Kross, Robert J, "Child restraint system"
   • Publication/Filing Date: Publication: 2000-01-04.
   • Brief Description: This patent describes a child restraint system.
   • Potential Anticipation: This is likely more focused on the safety and harnessing aspects of a child's seat, rather than the attachment to a stroller frame. Its relevance to US11192568 would be limited unless US11192568's claims specifically detail restraint systems.

8. US6189917B1

   • Full Citation: US6189917B1, Chen, Hsin-Fu, "Reversible stroller frame"
   • Publication/Filing Date: Publication: 2001-02-20.
   • Brief Description: This patent describes a stroller frame that can be reversed, likely allowing a child to face forward or backward.
   • Potential Anticipation: US11192568 mentions the ability of a seat to be forward or backward facing (e.g., FIG. 3 description). If any claims of US11192568 incorporate the reversibility of the frame or seat orientation, this patent could be relevant.

9. US6290240B1

   • Full Citation: US6290240B1, Chen, Hsin-Fu, "Quick-release wheel assembly"
   • Publication/Filing Date: Publication: 2001-09-18.
   • Brief Description: This patent focuses on a quick-release mechanism for stroller wheels.
   • Potential Anticipation: US11192568's claims do not explicitly focus on quick-release wheel assemblies. Its relevance is likely minimal to the core claims.

10. US6378879B1

    • Full Citation: US6378879B1, Hunter, Scott, "Stroller with child carrier attachment"
    • Publication/Filing Date: Publication: 2002-04-30.
    • Brief Description: This patent describes a stroller designed with an attachment for a child carrier.
    • Potential Anticipation: Highly relevant to claims concerning attachment mechanisms for additional seats or carriers (e.g., Claim 1 and Claim 16 of US11192568). It could potentially anticipate the general concept of a stroller receiving a separate child carrier.

11. US6715783B1

    • Full Citation: US6715783B1, Hunter, Scott, "Stroller attachment for a car seat"
    • Publication/Filing Date: Publication: 2004-04-06.
    • Brief Description: This patent specifically addresses an attachment that allows a car seat to be coupled to a stroller.
    • Potential Anticipation: Given that US11192568 discusses supporting various "seats" including car seats (e.g., FIG. 4 description), this patent is highly relevant. Claims involving the use of adapters to attach car seats to a stroller could be implicated.

12. US6817596B2

    • Full Citation: US6817596B2, Myers, Philip, "Infant car seat stroller assembly"
    • Publication/Filing Date: Publication: 2004-11-16.
    • Brief Description: This patent describes an assembly that combines an infant car seat and a stroller.
    • Potential Anticipation: This patent is relevant to the integration of car seats with strollers, potentially anticipating claims in US11192568 that allow for a car seat to be attached as a second seat.

13. US7182352B2

    • Full Citation: US7182352B2, Ogle, Benjamin S, "Stroller"
    • Publication/Filing Date: Publication: 2007-02-27.
    • Brief Description: This is a general patent on a "Stroller".
    • Potential Anticipation: Without a more specific title, the relevance is broad. It might disclose general stroller frame structures or components that are foundational to any stroller system, but likely not the specific "housing with a door" feature of US11192568's claims.

14. US7392994B2

    • Full Citation: US7392994B2, Meyers, Philip D, "Infant carrier with handle that folds under"
    • Publication/Filing Date: Publication: 2008-07-01.
    • Brief Description: This patent describes an infant carrier with a specific folding handle mechanism.
    • Potential Anticipation: The primary focus appears to be on the infant carrier's handle. Its relevance to US11192568's claims on removable seat attachment adapters and housings with doors is likely low, unless specific details of the infant carrier's attachment interface are described.

15. US7434812B2

    • Full Citation: US7434812B2, Ogle, Benjamin S, "Foldable stroller"
    • Publication/Filing Date: Publication: 2008-10-14.
    • Brief Description: This patent pertains to a foldable stroller.
    • Potential Anticipation: Similar to US6644675B1, this patent's primary relevance is to the folding mechanism of a stroller, which is a feature generally described in US11192568's background but not central to its independent claims regarding the seat attachment system.

16. US7810815B2

    • Full Citation: US7810815B2, Meyers, Philip D, "Stroller and attachment for a car seat"
    • Publication/Filing Date: Publication: 2010-10-12.
    • Brief Description: This patent describes a stroller and an attachment specifically for a car seat.
    • Potential Anticipation: Highly relevant to claims in US11192568 that involve attaching car seats to strollers using adapters.

17. US7866708B2

    • Full Citation: US7866708B2, Ogle, Benjamin S, "Stroller"
    • Publication/Filing Date: Publication: 2011-01-11.
    • Brief Description: This is another general patent on a "Stroller".
    • Potential Anticipation: Similar to US7182352B2, broad relevance to general stroller features, but less likely to anticipate the specific "housing with a door" features of US11192568's claims.

18. US8061730B2

    • Full Citation: US8061730B2, Meyers, Philip D, "Stroller and attachment for a car seat"
    • Publication/Filing Date: Publication: 2011-11-22.
    • Brief Description: This patent describes a stroller and an attachment for a car seat.
    • Potential Anticipation: Highly relevant to claims in US11192568 related to car seat attachments.

19. US8444158B2

    • Full Citation: US8444158B2, Chuang, Kuo-Feng, "Baby stroller"
    • Publication/Filing Date: Publication: 2013-05-21.
    • Brief Description: This is a patent describing a "Baby stroller".
    • Potential Anticipation: General relevance to stroller designs but unlikely to anticipate the specific attachment housing and door mechanism.

20. US8567794B2

    • Full Citation: US8567794B2, Ogle, Benjamin S, "Stroller with accessory attachment system"
    • Publication/Filing Date: Publication: 2013-10-29.
    • Brief Description: This patent describes a stroller equipped with a system for attaching accessories.
    • Potential Anticipation: This patent is highly relevant to the concept of attachment systems for strollers. Claims of US11192568, particularly those describing attachment housings and adapters, could be potentially anticipated if this reference discloses similar structural elements and functionality for accessories that could include seats.

Most Relevant Prior Art for US11192568:

The most relevant prior art documents would be those that disclose features closely related to the core novelty of US11192568, particularly the "seat attachment housings" with "adapter receiving cavities" and "doors configured to prevent access."

Based on titles, the most relevant external prior art citations for US11192568 likely include:

• US6974152B1 ("Stroller having child's seat adapter")
• US6378879B1 ("Stroller with child carrier attachment")
• US6715783B1 ("Stroller attachment for a car seat")
• US6817596B2 ("Infant car seat stroller assembly")
• US7810815B2 ("Stroller and attachment for a car seat")
• US8061730B2 ("Stroller and attachment for a car seat")
• US8567794B2 ("Stroller with accessory attachment system")

These patents explicitly address the attachment of seats or carriers to strollers, which is the broad functional goal of US11192568. A detailed analysis would focus on whether any of these references, individually, fully disclose or render obvious the specific combination of elements in US11192568's independent claims (Claim 1 and Claim 16), especially the unique "seat attachment housing" with its "adapter receiving cavity" and "door configured to prevent access" when not in use.