Jean-Paul Erchoff

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Belsele, BE

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Patents Grantslast 30 patents

Information Patent Grant
Slide projector and indexing mechanism for alternate slide trays of...
- Patent number 3,953,119
- Issue date Apr 27, 1976
- GAF Corporation
- Jean-Paul Erchoff
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Slide projector for receiving alternate slide trays of different co...
- Patent number 3,950,087
- Issue date Apr 13, 1976
- GAF Corporation
- Jean-Paul Erchoff
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY