Inventor · disambiguated record
Roger J. Llewelyn
Also filed as: LLEWELYN ROGER J
3 granted patents·27 citations·filing 1983–1988
68Inventor score
Technology areasG09G
Files withIBM3
Top patents by PatentIndex Score
3 records- 0148US4910505AGraphic display apparatus with combined bit buffer and character graphics storeIBM·Filed 1988·Granted Mar 20, 1990·13 cites·3 claims
- 0240US4649379AData display apparatus with character refresh buffer and row buffersIBM·Filed 1984·Granted Mar 10, 1987·11 cites·5 claims
- 0327US4644340AProgrammable timing circuit for cathode ray tubeIBM·Filed 1983·Granted Feb 17, 1987·3 cites·6 claims
Join the waitlist — get patent alerts
Get an alert when Roger J. Llewelyn files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →