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Woking, United Kingdom

John F Francis

Average Co-Inventor Count = 1.11

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 = 307

John F FrancisJohn Charles Terry (2 patents)John F FrancisBryan R Kirk (1 patent)John F FrancisBrian R Kirk (1 patent)John F FrancisJohn F Francis (13 patents)John Charles TerryJohn Charles Terry (9 patents)Bryan R KirkBryan R Kirk (2 patents)Brian R KirkBrian R Kirk (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. The Gillette Company (13 from 2,663 patents)


13 patents:

1. 4932123 - Improvements in or relating to safety razors

2. 4916812 - Safety razors magazines

3. 4868983 - Safety razor with plural adjustable blades

4. 4603477 - Safety razors

5. 4516321 - Safety razors

6. 4449428 - Method of manufacturing razor blade assemblies

7. 4443940 - Safety razor head

8. 4335508 - Safety razor heads

9. 4168571 - Shaving unit

10. 4084316 - Safety razors

11. 4063357 - Safety razors

12. 4047295 - Shaving unit dispenser container

13. 3940853 - Shaving unit with blade tensioning means

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as of
1/4/2026
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