Growing community of inventors

Richardson, TX, United States of America

Clarence Zierhut

Average Co-Inventor Count = 1.33

ph-index = 9

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 = 229

Clarence Zierhut ↔ Joseph P Howard (4 patents)Clarence Zierhut ↔ Edward J Kelly (3 patents)Clarence Zierhut ↔ Norman D Poisson (1 patent)Clarence Zierhut ↔ Curtis L Malm (1 patent)Clarence Zierhut ↔ Howard Weber (1 patent)Clarence ZierhutClarence Zierhut (16 patents)Joseph P HowardJoseph P Howard (5 patents)Edward J KellyEdward J Kelly (3 patents)Norman D PoissonNorman D Poisson (56 patents)Curtis L MalmCurtis L Malm (6 patents)Howard WeberHoward Weber (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. The Gillette Company (11 from 2,659 patents)

2. Electrocom Automation (4 from 45 patents)

3. Spectradyne LLC (1 from 13 patents)


16 patents:

1. D391153 - Writing instrument

2. D332777 - Combined portable hand-held personal computer and keyboard cradle mount

3. D332776 - Portable hand-held personal computer

4. D331400 - Keyboard with a cradle mount to support a portable handheld personal

5. D320980 - Cradle mount for a portable data terminal

6. D288926 - Multi-channel television converter

7. D284583 - Writing instrument cap

8. D284584 - Writing instrument cap

9. D284585 - Writing instrument cap

10. D273401 - Writing instrument cap

11. D273399 - Writing instrument cap

12. D273398 - Writing instrument cap

13. D273400 - Writing instrument cap

14. D259727 - Writing instrument

15. D257465 - Writing instrument

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as of
12/16/2025
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