Growing community of inventors

Geneseo, NY, United States of America

John E Spencer

Average Co-Inventor Count = 2.00

ph-index = 3

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 = 40

John E SpencerDouglas H Pearson (2 patents)John E SpencerWilbert F Janson, Jr (1 patent)John E SpencerTerrence L Fisher, Sr (1 patent)John E SpencerJohn H Minnick (1 patent)John E SpencerReginald S Greene (1 patent)John E SpencerPeter S Tisack (1 patent)John E SpencerJohn E Spencer (5 patents)Douglas H PearsonDouglas H Pearson (35 patents)Wilbert F Janson, JrWilbert F Janson, Jr (22 patents)Terrence L Fisher, SrTerrence L Fisher, Sr (15 patents)John H MinnickJohn H Minnick (5 patents)Reginald S GreeneReginald S Greene (2 patents)Peter S TisackPeter S Tisack (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Eastman-kodak Company (5 from 21,594 patents)


5 patents:

1. 5560563 - Light shield for closing the film slot of a film cartridge

2. 5194885 - Methods of, apparatus for, and a camera capable of automatically

3. 4821058 - Camera with flash responsive focus system

4. 4676620 - Demetering cam for a disk camera

5. 4492443 - Camera mechanism

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as of
12/7/2025
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