Obviousness

Obviousness Analysis under 35 U.S.C. § 103 for US Patent 8,365,799

This analysis identifies combinations of prior art references that would render the claims of US Patent 8,365,799 obvious to a person having ordinary skill in the art (POSITA) at the time of the invention (priority date: March 17, 2011). The core inventive concept of US'799 is a rigid window covering for a vehicle that magnetically attaches to the window frame, with the magnets recessed and covered by a panel to prevent scratching, and exerting sufficient pull force to remain stable during vehicle motion.

Independent Claim 1 Analysis

Independent Claim 1 defines a window covering with specific features: a rigid casing with first and second members defining channels, a panel covering a hole and extending over magnets, and permanent magnets disposed in the channels such that their outer surfaces are coplanar with the casing's outer surfaces. These magnets are configured for magnetic attachment to the vehicle's window frame and exert a sufficient pull force to prevent movement during vehicle operation.

Combination of Prior Art References:

A strong case for obviousness can be made by combining the teachings of US2595833A (Flaherty), US20090183844A1 (Boulos), and US3805872A (Lorber Flinck Co.).

1. US2595833A (Flaherty): This patent, titled "Screening for vehicles," clearly teaches a "screen for motor vehicles which is adapted to be removably secured in the window opening and to be held in position by the magnetic attraction between the frame of the screen and the metal frame of the window opening." [cite: Flaherty, Abstract] This directly addresses the concept of a window covering (screen) for a vehicle, magnetically attached to the window frame, and implies sufficient holding force for vehicle use. The screen includes a frame (casing) and screen material (panel).

2. US20090183844A1 (Boulos): Titled "Magnetically attachable window screen system," Boulos teaches a "window screen, a rigid frame, and a plurality of magnets provided along the perimeter of the rigid frame." [cite: Boulos, Abstract] While not explicitly vehicle-specific, Boulos introduces the critical element of a rigid frame and the placement of magnets along the perimeter.

3. US3805872A (Lorber Flinck Co.): This patent, "Magnetically attached cover," describes a cover with an "outer peripheral border portion formed as a pocket in which a flexible magnetic strip is held." [cite: Lorber Flinck, Abstract] This teaches the concept of covering or concealing magnets within a border or panel, preventing direct contact with the attachment surface.

Motivation for Combination:

A POSITA would be motivated to combine these references as follows:

• Flaherty + Boulos: A POSITA, seeking to improve the durability, stability, and aesthetic fit of the magnetically attached vehicle screen taught by Flaherty, would be motivated to incorporate the rigid frame and perimeter magnet arrangement disclosed in Boulos. A rigid frame would offer a more robust structure than a potentially less rigid frame, providing a more consistent fit and better performance in a dynamic vehicle environment.
• Resulting combination + Lorber Flinck: Given a rigid, magnetically-attached vehicle screen, a POSITA would further be motivated to cover the exposed magnets to prevent scratching or damage to the vehicle's window frame, or for aesthetic purposes. Lorber Flinck provides a clear teaching of enclosing magnets within a peripheral border or pocket for such protective or aesthetic benefits. This directly addresses the '799 patent's stated advantage of preventing scratching and retaining the magnets within the covering.

Addressing Specific Claim Limitations with the Combination:

• Casing with channels and coplanar magnet surfaces: The combination of Boulos's rigid frame with magnets along the perimeter and known prior art teaching recesses for magnets (e.g., US4409758A (Plaskolite) teaching a rigid plastic frame with a recess for a magnetic strip, or US4561223A (Defender Energy) teaching a retaining member with a groove for a magnetic strip) would make it obvious to a POSITA to integrate magnets into channels within the rigid frame. Configuring the magnets to be coplanar with the outer surface of the frame members is a common design choice for flush mounting, improved aesthetics, and effective magnetic contact.
• Ferromagnetic material in casing (Claim 9): While not explicitly stated in the primary combination, the '799 patent's description clarifies that the casing includes a ferromagnetic material, and the magnets are "magnetically attached to the first member" [cite: US8365799B2, Description, "the first magnets 32 a are magnetically attached to the first member 34"]. Given that permanent magnets are to be housed and secured within the casing, fabricating the casing (or at least the portions surrounding the magnets) from a ferromagnetic material like steel (as taught by Claim 9 and the '799 patent description [cite: US8365799B2, Description, "The ferromagnetic material 43 may be steel, such as mild steel, and the like."]) would be an obvious engineering choice for a POSITA to help retain the magnets within the casing due to magnetic attraction.
• Permanent magnets, rare earth metals (Claims 3-5): The choice of permanent magnets, specifically strong rare-earth magnets like neodymium (neodymium-iron-boron alloy), would be an obvious optimization for a POSITA seeking to maximize the pull force while minimizing magnet size, especially for an application requiring secure retention during vehicle motion. Neodymium magnets were independently discovered in 1984 and were commercially available and recognized as the strongest type of permanent magnet well before the 2011 priority date of US'799.
• Sufficient pull force for vehicle motion: Flaherty's disclosure of magnetic attachment for a vehicle screen inherently suggests a pull force sufficient for vehicle operation. The precise numerical values for magnet area or tolerance (Claims 6, 7) are design choices and optimization parameters, not inventive steps.

Independent Claim 17 Analysis

Independent Claim 17 describes a "window covering system" comprising a vehicle window frame (including a header and a footer) and the window covering of Claim 1, with the magnets specifically configured for attachment to the header and footer.

Obviousness:

Claim 17 incorporates all the features of Claim 1 and specifies their application within a system context of a vehicle window frame having a header and footer. As argued above, the window covering itself, with its rigid frame, recessed/covered magnets, and sufficient holding force, is rendered obvious by the combination of Flaherty, Boulos, and Lorber Flinck.

The additional specification of attachment to a "header and a footer" is also obvious. Vehicle window frames naturally define an opening with upper (header) and lower (footer) sections. Attaching a window covering at these points is the most logical and effective way to secure it to cover the opening. Flaherty's "removably secured in the window opening" [cite: Flaherty, Abstract] inherently covers attachment to the perimeter, including the header and footer. Similarly, Hess (US3670798A), describing a "window screen for attachment to a vehicle window opening and including a flexible frame carrying magnetic strips along its perimeter for magnetic attachment to the metal window frame," [cite: Hess, Abstract] implies attachment to the entire frame perimeter, including header and footer.

Dependent Claims 2, 8, 11-16 Analysis

• Claim 2 (Third and Fourth Members for Casing): Adding third and fourth members to form a complete, generally rectangular frame is a basic and obvious design choice for constructing a rigid casing that defines a hole and holds a panel, as seen in many existing window screens (e.g., Flaherty's frame 10).
• Claim 8 (Ledge on Magnet): A ledge on a block-shaped magnet is a minor structural design feature that a POSITA could implement for various reasons (e.g., aiding in magnet retention within a channel, or for aesthetic purposes). This is a routine design modification.
• Claims 11 & 12 (Panel Details): These claims elaborate on the panel's structure, including a covering portion and a border. These details are consistent with the teachings of Lorber Flinck regarding a border covering the magnets and are standard components for fabric window coverings.
• Claims 13-16 (Attachment Clips): These claims describe attachment clips with a ferromagnetic strip, particularly for use when the window frame is non-ferromagnetic, and further detail the clip's design with grooves, walls, shelves, and ramps. The use of an auxiliary ferromagnetic strip or clip to enable magnetic attachment to a non-magnetic surface is a well-known engineering solution. For example, Plaskolite (US4409758A) teaches a "perimeter strip for magnetically attractable extruded plastic window system" which uses a rigid plastic frame to house a magnetic strip. Defender Energy (US4561223A) also shows a "retaining member" with a "groove configured to hold a magnetic strip" for removable panel attachment. The specific geometric features (grooves, walls, shelves, ramps) described in Claims 15 and 16 represent routine design choices for securing the ferromagnetic strip and facilitating the attachment/detachment of the window covering, which a POSITA would readily implement.

In summary, the key elements of US Patent 8,365,799 are individually taught in the cited prior art, and the combination of these elements for a vehicle window covering is motivated by common design goals such as durability, scratch prevention, and robust attachment under dynamic conditions.