Assignee
PERTEC COMPUTER CORP
17 patents
Top patents by PatentIndex Score
US4027217AMay 31, 1977
Speed control for a motor
PERTEC COMPUTER CORP59 citations94
US4078192AMar 7, 1978
Synthesizer for multiphase waveforms
PERTEC COMPUTER CORP35 citations89
US4078173AMar 7, 1978
Light amplitude control system for position and motion transducers
PERTEC COMPUTER CORP35 citations89
US4237501ADec 2, 1980
Emergency head unload system for magnetic disk drive
PERTEC COMPUTER CORP55 citations87
US4357707ANov 2, 1982
Digital phase lock loop for flexible disk data recovery system
PERTEC COMPUTER CORP48 citations81
US4055814AOct 25, 1977
Phase locked loop for synchronizing VCO with digital data pulses
PERTEC COMPUTER CORP40 citations81
US4244109AJan 13, 1981
Apparatus for mounting and aligning printed circuit board
PERTEC COMPUTER CORP23 citations80
US4064561ADec 20, 1977
CRT key station which is responsive to centralized control
PERTEC COMPUTER CORP25 citations79
US4371904AFeb 1, 1983
Flexible magnetic disk system
PERTEC COMPUTER CORP25 citations77
US4167772ASep 11, 1979
Circuit board mounting means
PERTEC COMPUTER CORP26 citations75
US4563653AJan 7, 1986
Servo preamplifier and demodulator chain using transconductance balanced modulators
PERTEC COMPUTER CORP7 citations71
US4207601AJun 10, 1980
Transient temperature compensation for moving head disk drive
PERTEC COMPUTER CORP15 citations66
US4205357AMay 27, 1980
Disk drive unit incorporating a field-replaceable fixed disk assembly
PERTEC COMPUTER CORP9 citations66
US4012791AMar 15, 1977
Disk drive apparatus
PERTEC COMPUTER CORP14 citations66
US4425534AJan 10, 1984
Linear motor velocity sensor
PERTEC COMPUTER CORP5 citations60
US4301416ANov 17, 1981
Servo preamplifier and demodulator chain using transconductance balanced modulators
PERTEC COMPUTER CORP4 citations60
US4384309AMay 17, 1983
Closed loop servo demodulator for positioning a servo head
PERTEC COMPUTER CORP1 citations50