Growing community of inventors

Bryan, OH, United States of America

Douglas D Purdy

Average Co-Inventor Count = 3.00

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 = 45

Douglas D PurdyNicholas Kozumplik, Jr (2 patents)Douglas D PurdyStephen D Able (1 patent)Douglas D PurdyRobert C Elfers (1 patent)Douglas D PurdyDouglas D Purdy (2 patents)Nicholas Kozumplik, JrNicholas Kozumplik, Jr (11 patents)Stephen D AbleStephen D Able (14 patents)Robert C ElfersRobert C Elfers (2 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Ingersoll-rand Company (1 from 1,201 patents)

2. The Aro Corporation (1 from 86 patents)


2 patents:

1. 5649813 - Chamber insulation for prevention of icing in air motors

2. D370488 - Diaphragm pump

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1/2/2026
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