Growing community of inventors

Burbank, CA, United States of America

John Hobart Zentmyer

Average Co-Inventor Count = 1.22

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 = 408

John Hobart ZentmyerMark V Tyson (4 patents)John Hobart ZentmyerCora Jokinen (1 patent)John Hobart ZentmyerJohn Hobart Zentmyer (14 patents)Mark V TysonMark V Tyson (13 patents)Cora JokinenCora Jokinen (1 patent)
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Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. Other (5 from 832,761 patents)

2. Torq-masters Industries, Inc (4 from 4 patents)

3. Vehicular Technologies, Inc. (2 from 11 patents)

4. Vehicle Technologies, Inc. (2 from 2 patents)

5. Torq-masters, Inc. (1 from 1 patent)


14 patents:

1. D906388 - Automatic locking differential

2. 10731742 - Axle coupler with ring recess

3. D885450 - Vehicular differential replacement device

4. D848497 - Axle gear

5. D835165 - Automatic locking differential

6. 6269712 - Automotive full locking differential

7. 5816971 - Method for locking a differential

8. 5759126 - Electromagnetic ring actuator

9. 5759129 - Locking differential actuator assembly

10. 5637049 - Locking differential

11. 5603246 - Locking differential with radial dampening

12. 5413015 - Automotive vehicle differential assembly

13. 4109912 - Night stick structure

14. 4071808 - Method and circuit for operating an electrical flash-tube

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as of
12/16/2025
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