Growing community of inventors

Rochester, NY, United States of America

John M Coval

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 = 5

John M CovalStephen P North (2 patents)John M CovalJohn M Coval (2 patents)Stephen P NorthStephen P North (7 patents)
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Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. Eastman-kodak Company (2 from 21,594 patents)


2 patents:

1. 6622365 - Pinch quill, apparatus, and film winding method

2. 6491246 - Pinch spools one-time use cameras apparatus and methods

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as of
12/20/2025
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