Growing community of inventors

Washington, IL, United States of America

Phil Spengler

Average Co-Inventor Count = 5.00

ph-index = 1

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 = 5

Phil Spengler ↔ Richard A Carpenter (1 patent)Phil Spengler ↔ Stephen J Morey (1 patent)Phil Spengler ↔ Shawn M Ryon (1 patent)Phil Spengler ↔ Shaobin Liu (1 patent)Phil SpenglerPhil Spengler (1 patent)Richard A CarpenterRichard A Carpenter (11 patents)Stephen J MoreyStephen J Morey (7 patents)Shawn M RyonShawn M Ryon (5 patents)Shaobin LiuShaobin Liu (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Caterpillar Inc. (1 from 9,463 patents)


1 patent:

1. 10546435 - System and method of determining remaining useful life of an air filter

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12/29/2025
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