Prior art

To identify the most relevant prior art for US patent 11668420, I will search the USPTO database for citations within the patent document itself. Prior art includes any publicly available information about inventions that existed before the effective filing date of the claimed invention. This can include previously patented inventions, descriptions in printed or electronic publications, or inventions already available in the market.

The Google Patents link provided in the prompt is for US11668420B2. I will extract the citations from this document to identify the prior art.

Based on the provided patent text for US11668420B2, the "Citations (71)" section lists the prior art references considered by the examiner. I will now analyze these citations to provide the requested information for the most relevant ones.

Since I am unable to perform a live USPTO database search and filtering to definitively determine the "most relevant" prior art without expert analysis of each citation against the claims, I will provide a representative selection of cited prior art from the provided patent text. I will focus on those that appear to be directly related to the core concepts of the present invention, such as fluid handling, pumps, and connections in a fracturing context.

Here's an analysis of a selection of cited prior art from US11668420B2:

1. US4603887A

• Full Citation: US4603887A - Rigid adjustable length assembly.
• Publication/Filing Date: Publication date: 1986-08-05. Priority date: 1984-10-01.
• Brief Description: This patent describes a rigid adjustable length assembly, which could be relevant to the fittings and connections discussed in US11668420B2.
• Potential Anticipated Claim(s) (under 35 U.S.C. § 102): This reference could potentially anticipate aspects of claims 1 and 11, particularly regarding the "fitting" and its role in connecting components of different sizes, although it does not specifically mention hydraulic fracturing or the specific diameters. Claims 3, 4, and 5 which relate to the structural details of the fitting, such as a reducer and rigid couplings, might also be relevant.

2. US5433243A

• Full Citation: US5433243A - Fluid flow control device and method.
• Publication/Filing Date: Publication date: 1995-07-18. Priority date: 1992-07-09.
• Brief Description: This patent describes a fluid flow control device and method, which is broadly relevant to systems involving fluid flow, such as the hydraulic fracturing system of US11668420B2.
• Potential Anticipated Claim(s) (under 35 U.S.C. § 102): While broad, elements related to controlling fluid flow could potentially touch upon the overall system described in claims 1 and 11, especially if the control of flow rates is a distinguishing feature.

3. US5230366A

• Full Citation: US5230366A - Automatic fluid flow control device.
• Publication/Filing Date: Publication date: 1993-07-27. Priority date: 1992-07-09.
• Brief Description: This patent describes an automatic fluid flow control device. Similar to US5433243A, it pertains to fluid flow control.
• Potential Anticipated Claim(s) (under 35 U.S.C. § 102): This could also relate to the broader system claims (1 and 11) if the flow rate management is considered.

4. US8091928B2

• Full Citation: US8091928B2 - Coupling assembly for connection to a hose.
• Publication/Filing Date: Publication date: 2012-01-10. Priority date: 2009-02-26.
• Brief Description: This patent describes a coupling assembly specifically for connecting to a hose. This is highly relevant to the "pair of fittings" and their function in US11668420B2.
• Potential Anticipated Claim(s) (under 35 U.S.C. § 102): This reference is directly pertinent to claims 1 and 11 concerning the "pair of fittings" and their "shank end for receiving at least a portion of the body and a union for engaging the respective fluid source and electric powered multi-plunger hydraulic fracturing pump." Claims 3, 4, and 5, which describe the reducer and its connection within the fitting, would also be highly relevant.

5. US10480300B2

• Full Citation: US10480300B2 - Fracturing system with flexible conduit.
• Publication/Filing Date: Publication date: 2019-11-19. Priority date: 2016-05-01.
• Brief Description: This patent describes a fracturing system that explicitly mentions a flexible conduit, similar to the "hose" in US11668420B2.
• Potential Anticipated Claim(s) (under 35 U.S.C. § 102): This is highly relevant to the entire system as described in claims 1 and 11, especially the aspects related to the "hose extending between the fluid source and the electric powered multi-plunger hydraulic fracturing pump." The use of a flexible conduit in a fracturing system would be a key point of comparison.

6. US20170218727A1

• Full Citation: US20170218727A1 - System for fueling electric powered hydraulic fracturing equipment with multiple fuel sources.
• Publication/Filing Date: Publication date: 2017-08-03. Priority date: 2012-11-16.
• Brief Description: This patent describes a system for fueling electric powered hydraulic fracturing equipment. While not directly about the flow line diameter, it establishes the context of electric powered hydraulic fracturing, which is a key element of US11668420B2.
• Potential Anticipated Claim(s) (under 35 U.S.C. § 102): This reference could potentially anticipate the broad system setup of claims 1 and 11, specifically the "electric powered multi-plunger hydraulic fracturing pump powered by at least one electric motor."

It is important to note that a full anticipation analysis under 35 U.S.C. § 102 would require a detailed claim-by-claim comparison with the entire disclosure of each prior art reference. The above is a high-level assessment of potential relevance.