Growing community of inventors

Michigan City, IN, United States of America

Robert A Spychalski

Average Co-Inventor Count = 1.50

ph-index = 2

The patent ph-index is calculated by counting the number of publications for which an author has been cited by other authors at least that same number of times.

Forward Citations = 25

Robert A SpychalskiMarvin B Stark (1 patent)Robert A SpychalskiRonald G Schultz (1 patent)Robert A SpychalskiRobert A Spychalski (2 patents)Marvin B StarkMarvin B Stark (11 patents)Ronald G SchultzRonald G Schultz (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Pullman Incorporated (2 from 228 patents)


2 patents:

1. 4224877 - Railway hopper car closure actuating mechanism

2. 4134344 - Railway hopper car door lock

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as of
12/21/2025
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