DS

David M. Stumfall

SO Sony: 8 patents #5,352 of 25,231Top 25%
PR Printronix: 2 patents #27 of 75Top 40%
Overall (All Time): #884,401 of 4,157,543Top 25%
6
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
6160591 Apparatus and method of providing switching frequency synchronization Kazutoyo Sekine 2000-12-12
6031299 Apparatus and method of providing EMI filtering Bruce R. Ferguson 2000-02-29
6011322 Apparatus and method for providing power to circuitry implementing two different power sources Kazutoyo Sekine 2000-01-04
5942811 Apparatus and method for extending the supply of reserved power during a line power interruption Kazutoyo Sekine 1999-08-24
4875409 Magnetic print hammer actuator protection circuit David Condon 1989-10-24
4507796 Electronic apparatus having low radio frequency interference from system clock signal 1985-03-26