Philip E. Rollhaus

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Chicago, IL, US

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Patents Grantslast 30 patents

Information Patent Grant
Machine-readable optical disc with reading-inhibit agent
- Patent number 6,434,109
- Issue date Aug 13, 2002
- SpectraDisc Corporation
- Philip E. Rollhaus
- G11 - INFORMATION STORAGE
Information Patent Grant
Machine-readable optical disc with reading-inhibit agent
- Patent number 6,343,063
- Issue date Jan 29, 2002
- SpectraDisc Corp.
- Philip E. Rollhaus
- G11 - INFORMATION STORAGE
Information Patent Grant
Machine-readable optical disc with reading-inhibit agent
- Patent number 6,011,772
- Issue date Jan 4, 2000
- SpectraDisc Corporation
- Philip E. Rollhaus
- G11 - INFORMATION STORAGE
Information Patent Grant
Keyboard entry system
- Patent number 4,694,280
- Issue date Sep 15, 1987
- Quixote Corporation
- Philip E. Rollhaus
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Keyboard entry system
- Patent number 4,638,306
- Issue date Jan 20, 1987
- Quixote Corporation
- Philip Rollhaus
- G06 - COMPUTING CALCULATING COUNTING

Patents Applicationslast 30 patents

Information Patent Application
Machine-readable optical disc with reading-inhibit agent
- Publication number 20010046204
- Publication date Nov 29, 2001
- SpectraDisc Corporation
- Philip E. Rollhaus
- G11 - INFORMATION STORAGE