RONALD HARVEY ROSENFIELD

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SAN DIEGO, CA, US

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Patents Grantslast 30 patents

Information Patent Grant
Angle trisector, as validated to perform accurately over a wide ran...
- Patent number 10,994,569
- Issue date May 4, 2021
- Ronald Harvey Rosenfield
- B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES

Patents Applicationslast 30 patents

Information Patent Application
ANGLE TRISECTOR, AS VALIDATED TO PERFORM ACCURATELY OVER A WIDE RAN...
- Publication number 20210178804
- Publication date Jun 17, 2021
- RONALD HARVEY ROSENFIELD
- B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
Information Patent Application
ANGLE TRISECTOR, AS VALIDATED TO PERFORM ACCURATELY OVER A WIDE RAN...
- Publication number 20180201050
- Publication date Jul 19, 2018
- RONALD HARVEY ROSENFIELD
- B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES