Assignee
IRWIN MAGNETIC SYSTEMS INC
US·14 granted patents·510 citations·filing 1981–1989
Technology mixG11B14
Top patents by PatentIndex Score
14 records- 0197US5055951AMethod and apparatus for servo-positioning movable transducer headsIRWIN MAGNETIC SYSTEMS INC·Filed 1989·Granted Oct 8, 1991·104 cites·62 claims
- 0295US4586094AMethod and apparatus for pre-recording tracking information on magnetic mediaIRWIN MAGNETIC SYSTEMS INC·Filed 1984·Granted Apr 29, 1986·84 cites·27 claims
- 0395US4472750AData 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
- 0489US4498129AMethod and apparatus for normalizing servo-positioning signalsIRWIN MAGNETIC SYSTEMS INC·Filed 1981·Granted Feb 5, 1985·38 cites·12 claims
- 0581US4647994AMiniaturized cartridge-type tape drive for data processorsIRWIN MAGNETIC SYSTEMS INC·Filed 1984·Granted Mar 3, 1987·28 cites·25 claims
- 0680US4646175AMethod 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
- 0775US4807067ACartridge tape driveIRWIN MAGNETIC SYSTEMS INC·Filed 1987·Granted Feb 21, 1989·19 cites·10 claims
- 0874US5003408AMethod and apparatus for removing data stream variationsIRWIN MAGNETIC SYSTEMS INC·Filed 1988·Granted Mar 26, 1991·21 cites·35 claims
- 0972US4796110ASystem and method for encoding and storing digital information on magnetic tapeIRWIN MAGNETIC SYSTEMS INC·Filed 1986·Granted Jan 3, 1989·23 cites·20 claims
- 1061US4849841ATransducer head core structure with recessed magnetic closuresIRWIN MAGNETIC SYSTEMS INC·Filed 1987·Granted Jul 18, 1989·14 cites·17 claims
- 1152US4819107AMagnetic transducer head structureIRWIN MAGNETIC SYSTEMS INC·Filed 1986·Granted Apr 4, 1989·10 cites·5 claims
- 1247US4954921AMagnetic transducer head structure with reduced leakage between core circuitsIRWIN MAGNETIC SYSTEMS INC·Filed 1988·Granted Sep 4, 1990·8 cites·9 claims
- 1333US5050025ALead screw and follower-type head positioner for data recordersIRWIN MAGNETIC SYSTEMS INC·Filed 1989·Granted Sep 17, 1991·2 cites·16 claims
- 1431US5001584AHead-positioner arm for data recordersIRWIN MAGNETIC SYSTEMS INC·Filed 1989·Granted Mar 19, 1991·1 cites·30 claims
Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →