Growing community of inventors

Lexington, MA, United States of America

Stephen R Sofen

Average Co-Inventor Count = 3.60

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 = 13

Stephen R SofenJohn Ferguson (1 patent)Stephen R SofenWilliam C Schwarzel (1 patent)Stephen R SofenKenneth S Norland (1 patent)Stephen R SofenJames R Freedman (1 patent)Stephen R SofenKent M Young (1 patent)Stephen R SofenMichael A Young (1 patent)Stephen R SofenRobert P Short (1 patent)Stephen R SofenRong C Liang (1 patent)Stephen R SofenRita S Shon Baker (1 patent)Stephen R SofenStephen R Sofen (3 patents)John FergusonJohn Ferguson (36 patents)William C SchwarzelWilliam C Schwarzel (14 patents)Kenneth S NorlandKenneth S Norland (11 patents)James R FreedmanJames R Freedman (8 patents)Kent M YoungKent M Young (8 patents)Michael A YoungMichael A Young (8 patents)Robert P ShortRobert P Short (4 patents)Rong C LiangRong C Liang (3 patents)Rita S Shon BakerRita S Shon Baker (2 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Polaroid Corporation (3 from 2,176 patents)


3 patents:

1. 5328799 - Thermographic and photothermographic imaging materials

2. 5206208 - Stabilization of thermal images

3. 4463082 - Silver diffusion transfer film unit with noble metal compound as

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12/10/2025
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