Louis H. Chang

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San Jose, CA, US

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Patents Grantslast 30 patents

Information Patent Grant
Control apparatus for serial printer
- Patent number 4,103,766
- Issue date Aug 1, 1978
- Xerox Corporation
- Frank D. Ruble
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Control apparatus for serial printer
- Patent number 4,091,911
- Issue date May 30, 1978
- Xerox Corporation
- Louis H. Chang
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Increment-decrement logic for serial printer
- Patent number 4,058,195
- Issue date Nov 15, 1977
- Xerox Corporation
- John C. Fravel
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Position retry apparatus for serial printer
- Patent number 4,037,216
- Issue date Jul 19, 1977
- Xerox Corporation
- Louis H. Chang
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Signal priority logic for serial printer
- Patent number 4,035,781
- Issue date Jul 12, 1977
- Xerox Corporation
- Louis H. Chang
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS