Growing community of inventors

Washington, IL, United States of America

Robert M Alt, Sr

Average Co-Inventor Count = 2.40

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 = 49

Robert M Alt, SrMax E Butterfield (2 patents)Robert M Alt, SrJames E March (1 patent)Robert M Alt, SrRobert M Alt, Sr (2 patents)Max E ButterfieldMax E Butterfield (3 patents)James E MarchJames E March (1 patent)
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Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. Caterpillar Tractor Co. (2 from 1,981 patents)


2 patents:

1. 4072331 - Door latch having three-way actuation means

2. 4062577 - Door holding apparatus

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as of
1/19/2026
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