Gerhard Ritzerfeld

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1000 Berlin 33, DE

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Patents Grantslast 30 patents

Information Patent Grant
Xerographic or electrostatic copying apparatus capable of copying o...
- Patent number 4,354,757
- Issue date Oct 19, 1982
- Gerhard Ritzerfeld
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Duplicator machine with means for applying to the copies different...
- Patent number 4,129,073
- Issue date Dec 12, 1978
- Gerhard Ritzerfeld
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information Patent Grant
Feeding of sheets and cards in a rotary duplicator machine capable...
- Patent number 4,102,267
- Issue date Jul 25, 1978
- Gerhard Ritzerfeld
- B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL