Donald M. Rosenthal

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Claremont, CA, US

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Patents Grantslast 30 patents

Information Patent Grant
Wax pencil holding device and sharpener
- Patent number 5,957,602
- Issue date Sep 28, 1999
- Donald M. Rosenthal
- B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
Information Patent Grant
Wax pencil holding device
- Patent number 5,722,782
- Issue date Mar 3, 1998
- Donald M. Rosenthal
- B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
Information Patent Grant
Wax pencil holding device and sharpener
- Patent number 5,551,787
- Issue date Sep 3, 1996
- Donald M. Rosenthal
- B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES