Polytel Corp.

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Sunnyvale, CA, US

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Patents Grantslast 30 patents

Information Patent Grant
Matrix keyboard
- Patent number 4,567,469
- Issue date Jan 28, 1986
- Polytel Corp.
- Sherif Danish
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Multikey keyboard for inputting data into a computer
- Patent number 4,555,693
- Issue date Nov 26, 1985
- Polytel Corp.
- Sherif Danish
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Matrix keyboard with plurality of sequences of cascaded electrical...
- Patent number 4,532,497
- Issue date Jul 30, 1985
- Polytel Corp.
- Sherif Danish
- H03 - BASIC ELECTRONIC CIRCUITRY

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