Growing community of inventors

Rochester, NY, United States of America

Marc Douglas Spencer

Average Co-Inventor Count = 1.67

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 = 122

Marc Douglas SpencerEzra Robert Gold (1 patent)Marc Douglas SpencerGregory J Lukins (1 patent)Marc Douglas SpencerFrank Duver (1 patent)Marc Douglas SpencerBruce Arden (1 patent)Marc Douglas SpencerMarc Douglas Spencer (2 patents)Ezra Robert GoldEzra Robert Gold (28 patents)Gregory J LukinsGregory J Lukins (3 patents)Frank DuverFrank Duver (1 patent)Bruce ArdenBruce Arden (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Other (1 from 832,880 patents)

2. Eastman-kodak Company (1 from 21,595 patents)


2 patents:

1. 6047230 - Automatic bicycle transmission

2. 5713032 - Compound document processing system

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as of
1/3/2026
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