Growing community of inventors

Roanoke, VA, United States of America

Steven W Drumheller

Average Co-Inventor Count = 2.00

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 = 10

Steven W DrumhellerTed C Chang (2 patents)Steven W DrumhellerSteven W Drumheller (2 patents)Ted C ChangTed C Chang (9 patents)
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Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. Ingersoll-rand Company (2 from 1,201 patents)


2 patents:

1. 5511800 - Reciprocal chuck for paving breaker

2. 5431235 - Reciprocal chuck for paving breaker

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as of
12/20/2025
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