Marshall Williams — 17 Patents at Ampex

Marshall Williams has been granted 17 US patents while listed as an inventor at Ampex. The first was granted in 1984 and the most recent in May 2015. Marshall Williams ranks #263,971 of 4,157,543 US inventors in our database (top 6.3%). Patent records list Marshall Williams in Fremont, CA, US.

Patents per Year

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Showing 1–17 of 17 patents

Patent #	Title	Co-Inventors	Date	Approx Value ⓘ
9042833	Infrared and capacitance based sensing for proximity detection	Nagendra Bage Jayaraj, Khaled Ahmad Obeidat, Michael M. Lee	2015-05-26	$76,785,000
7921309	Systems and methods for determining and managing the power remaining in a handheld electronic device	David Isbister, Nicholas Vaccaro	2011-04-05	$125,551,000
6580461	Line-quadrupler in home theater uses line-doubler of AV-part and scaler in graphics controller of PC-part	Paul Chambers, Christopher Coley, Jeroen Heuvelman	2003-06-17	$1,034,000
6437828	Line-quadrupler in home theater uses line-doubler of AV-part and scaler in graphics controller of PC-part	Paul Chambers, Christopher Coley, Jeroen Heuvelman	2002-08-20	$1,097,000
6014750	Techniques for distributing/supplying intra-computer DC power to external peripheral devices of a computer system	—	2000-01-11	$43,160,000
5768600	Method for supplying DC power from a PC's internal power supply to any associated peripheral devices	—	1998-06-16	$25,165,000
5153850	Method and apparatus for modifying two's complement multiplier to perform unsigned magnitude multiplication	—	1992-10-06	$152,000
4802023	System for reading and writing vertical interval time code	—	1989-01-31
4786985	Method and apparatus for extracting binary signals included in vertical blanking intervals of video signals	—	1988-11-22
4679098	Video tape transport servo for variable tape speed control	David R. Rodal	1987-07-07
4594563	Signal comparison circuit and phase-locked-loop using same	—	1986-06-10
4560983	Dynamically interactive responsive control device and system	—	1985-12-24
4557434	Tape remaining circuit	—	1985-12-10
4532560	Apparatus and method for indicating tape time	—	1985-07-30
4530107	Shift register delay circuit	—	1985-07-16
4446389	Quadrature tach decoder circuit	David O'Gwynn	1984-05-01
4427978	Multiplexed liquid crystal display having a gray scale image	—	1984-01-24

Marshall Williams — 17 Patents

Patents per Year

Issued Patents All Time

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