Growing community of inventors

Johnstown, OH, United States of America

David J Knecht

Average Co-Inventor Count = 2.00

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 = 83

David J KnechtPaul R Pelfrey (2 patents)David J KnechtDavid J Knecht (2 patents)Paul R PelfreyPaul R Pelfrey (25 patents)
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Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. Crane Plastics Company LLC (1 from 36 patents)

2. Crane Plastics Siding LLC (1 from 6 patents)


2 patents:

1. 6516577 - Exterior panel

2. 6223488 - Vented siding

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as of
1/2/2026
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