Growing community of inventors

Konigstein, Germany

Otto Zapf

Average Co-Inventor Count = 1.04

ph-index = 18

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 = 825

Otto ZapfJosef Kuchinke (2 patents)Otto ZapfDavid A Rowland (1 patent)Otto ZapfOtto Zapf (43 patents)Josef KuchinkeJosef Kuchinke (2 patents)David A RowlandDavid A Rowland (5 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Allsteel Inc. (12 from 51 patents)

2. Other (10 from 832,812 patents)

3. Knoll International, Inc. (8 from 93 patents)

4. Hauserman, Inc. (2 from 29 patents)

5. Drabert Sohne Minden (westf.) (2 from 4 patents)

6. The Marvel Group, Inc. (1 from 12 patents)


43 patents:

1. 7445288 - Vehicle seat

2. 6959964 - Portable backrest structure

3. D503560 - Stacking chair

4. 6435615 - Seating furniture with downwardly movable, pivoting backrest

5. D453900 - Panel connector top cap

6. 5649739 - Backrest for a seat arrangement

7. 5636897 - Seating furniture cover

8. D373273 - Seat

9. D363391 - Desk

10. 5448863 - Covered wall unit and method of making same

11. D360786 - Seat

12. D348787 - Chair

13. D346072 - Rolling chair

14. D331513 - Drawer unit

15. D331335 - File cabinet

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idiyas.com
as of
12/19/2025
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