John K. Ham

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Simi, CA, US

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Patents Grantslast 30 patents

Information Patent Grant
Uniform print density and registration in an impact printer
- Patent number 4,806,031
- Issue date Feb 21, 1989
- Dataproducts Corporation
- Paul O. Amdahl
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information Patent Grant
Microprogrammable processor control printer system
- Patent number 4,282,583
- Issue date Aug 4, 1981
- Dataproducts Corporation
- Sultan W. Khan
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Microprogrammable processor control printer system
- Patent number 4,179,732
- Issue date Dec 18, 1979
- Dataproducts Corporation
- Sultan W. Khan
- G06 - COMPUTING CALCULATING COUNTING