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For the Inventor, By the Inventor

DE

Zeiss Ikon Ag Goerzwerk


USPTO Granted Patents = 3

Forward Citations = 41

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2 inventors (with patents filed for the assignee):

goldMedal Werner Tietz (2 out of 6 patents)

silverMedal Helmut Tobel (1 out of 1 patent)


3 patents:

1. 4325242 - Multi-level lock system and method (1982-04-20),
2. 4262506 - Cylinder lock with warning of entry and drilling attempts (1981-04-21),
3. 4222252 - Cylinder lock with a lock picking impediment (1980-09-16),
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USPTO Data Jan 1 1976 - Dec 16 2025

3 Patents

#309 in

#8,274 in Germany

...
DE

Zeiss Ikon Ag Goerzwerk

Forward Citations = 41

2 inventors:

goldMedal Werner Tietz (2 out of 6 patents)

silverMedal Helmut Tobel (1 out of 1 patent)

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