DR

David R. Rodal

AM Ampex: 9 patents #8 of 247Top 4%
UN Unknown: 2 patents #12,644 of 83,584Top 20%
AS Ampex Systems: 1 patents #7 of 36Top 20%
Overall (All Time): #429,540 of 4,157,543Top 15%
12
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
5255257 Frequency, phase and amplitude control apparatus and method for acousto-optic deflector optimization Lawrence M. Bryant, James W. Dickson 1993-10-19
5248112 Tape transport control system with a feedforward capstan drive to the reel motors Glenn T. Yoshida 1993-09-28
4866547 Circuit for detecting the end of a tape by counting reel revolutions Nathan W. Osborn 1989-09-12
4800450 Method and apparatus for controlling deployment of a tape transport member Nathan W. Osborn 1989-01-24
4767970 Dynamic brake control for a tape drive system 1988-08-30
4751586 Rotary head tape transport servo system having high speed servo lock capability 1988-06-14
4749927 Adaptive digitally controlled motor drive system and method Nathan W. Osborn, Robert B. Steele 1988-06-07
4739948 Reel servo control with resonance damping circuit Harold V. Clark 1988-04-26
4730108 Ambient light insensitive circuit with frequency matching Nathan W. Osborn 1988-03-08
4679098 Video tape transport servo for variable tape speed control Marshall Williams 1987-07-07
4672474 Synthetic control track signal producing apparatus for video tape machines 1987-06-09
4481449 Power fail servo system 1984-11-06