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Solingen, Germany

S. Franzen Sohne Gmbh & Co.

USPTO Granted Patents = 16

Trademarks = 2

Forward Citations = 186

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7 inventors (with patents filed for the assignee):

Helmut Klein (4 out of 14 patents)

Peter Milles (4 out of 4 patents)

Rudi H Duringer (4 out of 5 patents)

4. Rudi Dueringer (3 out of 3 patents)

5. Jurgen Sersch (2 out of 3 patents)

6. Laszlo Bako (2 out of 2 patents)

7. Hans U Werner (2 out of 3 patents)

16 patents: Sort by Forward Citations

1. 5307657 - Permutation lock, in particular for trunks pieces of furniture or the (1994-05-03),

2. 5216905 - Lock, in particular, for suitcases or the like (1993-06-08),

3. 5111918 - Rollable suitcase (1992-05-12),

4. 5106132 - Closure device for suitcases, briefcases or the like (1992-04-21),

5. 4823574 - Permutation lock (1989-04-25),

6. 4819466 - Closure mechanism for a case (1989-04-11),

7. 4771617 - Permutation lock for containers such as suitcases (1988-09-20),

8. 4679833 - Closure mechanism for suitcases or the like (1987-07-14),

9. 4651545 - Combination lock (1987-03-24),

10. 4644767 - Permutation lock having rotary dials and a dial locking spring (1987-02-24),

11. 4615194 - Permutation lock (1986-10-07),

12. 4610152 - Combination lock for the securing of skis, bicycles or the like (1986-09-09),

13. 4487043 - Permutation lock (1984-12-11),

14. 4385509 - Permutation lock (1983-05-31),

15. 4279136 - Combination lock for suitcases, bags or the like (1981-07-21),

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USPTO Data Jan 1 1976 - Dec 16 2025

16 Patents

#12 in Solingen

#2,627 in Germany

#36,655 in the World

Solingen, Germany

S. Franzen Sohne Gmbh & Co.

Forward Citations = 186

7 inventors:

Helmut Klein (4 out of 14 patents)

Peter Milles (4 out of 4 patents)

Rudi H Duringer (4 out of 5 patents)

4. Rudi Dueringer (3 out of 3 patents)

5. Jurgen Sersch (2 out of 3 patents)

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