Roger J. Llewelyn

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Winchester, GB

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Patents Grantslast 30 patents

Information Patent Grant
Graphic display apparatus with combined bit buffer and character gr...
- Patent number 4,910,505
- Issue date Mar 20, 1990
- International Business Machines Corporation
- Paul A. Beaven
- G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
Information Patent Grant
Data display apparatus with character refresh buffer and row buffers
- Patent number 4,649,379
- Issue date Mar 10, 1987
- International Business Machines Corp.
- David A. Canton
- G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
Information Patent Grant
Programmable timing circuit for cathode ray tube
- Patent number 4,644,340
- Issue date Feb 17, 1987
- International Business Machines Corporation
- Brian L. Holloway
- G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS