Growing community of inventors

Cheshire, CT, United States of America

Robert L Hillberg

Average Co-Inventor Count = 1.22

ph-index = 10

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 = 174

Robert L HillbergFrederick F Stevens, Jr (4 patents)Robert L HillbergWilliam J Connellan (1 patent)Robert L HillbergRobert L Hillberg (14 patents)Frederick F Stevens, JrFrederick F Stevens, Jr (6 patents)William J ConnellanWilliam J Connellan (1 patent)
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Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. Other (4 from 832,812 patents)

2. C.o.p. Corp. (4 from 7 patents)

3. Wildey Firearms Company, Inc. (3 from 3 patents)

4. Browning Arms Company (1 from 22 patents)

5. Bellmore-johnson Tool Co. (1 from 3 patents)


14 patents:

1. 4472901 - Pistol grip assembly

2. 4424638 - Handgun

3. 4416078 - Handgun

4. 4407085 - Handgun firing mechanism

5. 4400901 - Firearm having inertially responsive safety mechanism

6. 4400900 - Multi-barrel handgun firing mechanism

7. 4392320 - Trigger retaining and stabilizing means

8. D263413 - Handgun

9. D262567 - Rifle

10. 4291481 - Firearm magazine safety mechanism

11. 4221066 - Firearm grip assembly

12. 4208947 - Firearm hammer blocking safety mechanism

13. 4141164 - Magazine isolator for pump shotguns

14. 3988849 - Signal launcher

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idiyas.com
as of
12/19/2025
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