Martin P. Haberstroh

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San Diego, CA, US

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Patents Grantslast 30 patents

Information Patent Grant
Sketching devices having improved geometry
- Patent number 8,313,329
- Issue date Nov 20, 2012
- Charles Haberstroh
- G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
Information Patent Grant
Kit with integral sketching device
- Patent number 8,057,232
- Issue date Nov 15, 2011
- Charles Haberstroh
- G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS

Patents Applicationslast 30 patents

Information Patent Application
Sketching Devices having Improved Geometry
- Publication number 20120058454
- Publication date Mar 8, 2012
- Charles Haberstroh
- G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
Information Patent Application
Sketching Device for Copy Paper
- Publication number 20110109077
- Publication date May 12, 2011
- Charles Haberstroh
- B42 - BOOKBINDING ALBUMS FILES SPECIAL PRINTED MATTER
Information Patent Application
Kit With Integral Sketching Device
- Publication number 20100105014
- Publication date Apr 29, 2010
- Charles Haberstroh
- G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS