Inventor · disambiguated record
Francis Lum
Also filed as: LUM FRANCIS
7 granted patents·322 citations·filing 1980–1984
88Inventor score
Technology areasG11B
Top patents by PatentIndex Score
7 records- 0195US4586094AMethod and apparatus for pre-recording tracking information on magnetic mediaIRWIN MAGNETIC SYSTEMS INC·Filed 1984·Granted Apr 29, 1986·84 cites·27 claims
- 0295US4472750AData record with pre-recorded transducer positioning signals, and system for utilizing sameIRWIN MAGNETIC SYSTEMS INC·Filed 1981·Granted Sep 18, 1984·134 cites·58 claims
- 0385US4462053AMethod for controlling a disc headIRWIN INT INC·Filed 1981·Granted Jul 24, 1984·33 cites·20 claims
- 0481US4647994AMiniaturized cartridge-type tape drive for data processorsIRWIN MAGNETIC SYSTEMS INC·Filed 1984·Granted Mar 3, 1987·28 cites·25 claims
- 0580US4646175AMethod and apparatus for positioning transducers by digital conversion of analog-type signalsIRWIN MAGNETIC SYSTEMS INC·Filed 1984·Granted Feb 24, 1987·24 cites·29 claims
- 0677USD270055SCombined disc and tape driveIRWIN INT INC·Filed 1980·Granted Aug 9, 1983·16 cites·1 claims
- 0742USD270348SIntegrated disc and tape recorder drive unitIRWIN INT INC·Filed 1980·Granted Aug 30, 1983·3 cites·1 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →