Inventor
VALA JOHN D
US15 patents
⚠️ This page may combine multiple inventors who share the name “VALA JOHN D”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
UNISYS CORP
14 patentsUS5453849ASep 26, 1995
Integrating cylinder for object illumination
UNISYS CORP40 citations95
US5519513AMay 21, 1996
Techniques for illuminating objects
UNISYS CORP26 citations92
US6744469B1Jun 1, 2004
Illumination compensation using built-in reference
UNISYS CORP29 citations91
US5825945AOct 20, 1998
Document imaging with illumination from lambertian surfaces
UNISYS CORP18 citations89
US6178014B1Jan 23, 2001
Methods for illuminating documents
UNISYS CORP7 citations73
US5780841AJul 14, 1998
Document-image camera mounted on reversible clamp
UNISYS CORP4 citations73
US5491336AFeb 13, 1996
Document illumination with Lambertian cavity
UNISYS CORP9 citations73
US5272331ADec 21, 1993
Document imaging camera with lamp bent into symmetrical lamp segments
UNISYS CORP4 citations73
US5591961AJan 7, 1997
Illumination with bent fluorescent tubes
UNISYS CORP1 citations62
US5513274AApr 30, 1996
Adjusting illumination for image lift to match camera
UNISYS CORP1 citations62
US5471048ANov 28, 1995
Document imaging lamps with bent dark ends
UNISYS CORP2 citations62
US5371356ADec 6, 1994
Document imaging with `doubly-bent` lamps
UNISYS CORP3 citations62
US6246464B1Jun 12, 2001
Illumination system
UNISYS CORP2 citations59
US5717504AFeb 10, 1998
Apparatus for illuminating documents
UNISYS CORP0 citations51