Inventor
BUTTERWORTH MARK M
US19 patents
⚠️ This page may combine multiple inventors who share the name “BUTTERWORTH MARK M”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HEWLETT PACKARD CO
8 patentsUS5847507ADec 8, 1998
Fluorescent dye added to epoxy of light emitting diode lens
HEWLETT PACKARD CO347 citations99
US5010241AApr 23, 1991
Sensor array and illumination system for a large depth-of-field bar code scanner
HEWLETT PACKARD CO186 citations99
US6139174AOct 31, 2000
Light source assembly for scanning devices utilizing light emitting diodes
HEWLETT PACKARD CO151 citations98
US6005722ADec 21, 1999
Optical display system including a light valve
HEWLETT PACKARD CO192 citations98
US6128049AOct 3, 2000
Use of shutter to control the illumination period in a ferroelectric liquid crystal-based spatial light modulator display device
HEWLETT PACKARD CO69 citations96
US6498632B1Dec 24, 2002
Color reflective ferroelectric liquid crystal light valve with three spatial light modulators and increased light throughput
HEWLETT PACKARD CO15 citations84
US5929999AJul 27, 1999
Light source for tristimulus colorimetry
HEWLETT PACKARD CO17 citations84
US6313820B1Nov 6, 2001
Method of operating a ferroelectric liquid crystal spatial light modulator in non-DC balanced mode with decreased pixel sticking
HEWLETT PACKARD CO13 citations74
AVAGO TECH ECBU IP SG PTE LTD
3 patentsUS7474297B2Jan 6, 2009
Contaminant-resistant optical mouse and cradle
AVAGO TECH ECBU IP SG PTE LTD14 citations83
US7446756B2Nov 4, 2008
Apparatus for controlling the position of a screen pointer with low sensitivity to particle contamination
AVAGO TECH ECBU IP SG PTE LTD9 citations83
US7460711B2Dec 2, 2008
Efficient method for reading meter values by processing digital images of a meter
AVAGO TECH ECBU IP SG PTE LTD2 citations63