Inventor
BETENSKY ELLIS I
US51 patents
⚠️ This page may combine multiple inventors who share the name “BETENSKY ELLIS I”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
US PRECISION LENS INC
10 patentsUS5313330AMay 17, 1994
Zoom projection lens systems
US PRECISION LENS INC134 citations98
US5677797AOct 14, 1997
Method for correcting field curvature
US PRECISION LENS INC94 citations96
US4300817ANov 17, 1981
Projection lens
US PRECISION LENS INC59 citations96
US4526442AJul 2, 1985
Compact projection lens
US PRECISION LENS INC45 citations93
US4348081ASep 7, 1982
Projection lens
US PRECISION LENS INC50 citations93
US4697892AOct 6, 1987
Projection lens
US PRECISION LENS INC22 citations82
US4815831AMar 28, 1989
Projection lens with color correction
US PRECISION LENS INC18 citations74
US4801196AJan 31, 1989
Wide angle projection lens
US PRECISION LENS INC18 citations74
US4707084ANov 17, 1987
Projection lens
US PRECISION LENS INC11 citations74
US4163604AAug 7, 1979
Projection lens
US PRECISION LENS INC6 citations63
EASTMAN KODAK CO
8 patentsUS5493448AFeb 20, 1996
Zoom lens having weak front lens group
EASTMAN KODAK CO90 citations96
US5428480AJun 27, 1995
Zoom lens having weak plastic element
EASTMAN KODAK CO90 citations96
US5315440AMay 24, 1994
Zoom lens having weak front lens group
EASTMAN KODAK CO95 citations96
US5241337AAug 31, 1993
Real image viewfinder requiring no field lens
EASTMAN KODAK CO92 citations96
US4828372AMay 9, 1989
Wide-angle zoom lens
EASTMAN KODAK CO34 citations93
US5182592AJan 26, 1993
Real image zoom viewfinder
EASTMAN KODAK CO7 citations74
US4838668AJun 13, 1989
Zoom lens
EASTMAN KODAK CO14 citations74
US4757372AJul 12, 1988
SLR zoom camera
EASTMAN KODAK CO12 citations74
VIVITAR CORP
7 patentsUS4749268AJun 7, 1988
Autofocusing zoom lens
VIVITAR CORP23 citations82
US4466708AAug 21, 1984
Zoom lens
VIVITAR CORP16 citations74
US4307943ADec 29, 1981
Close focusing zoom lens
VIVITAR CORP11 citations74
US4099849AJul 11, 1978
Wide angle objective
VIVITAR CORP12 citations74
US4394072AJul 19, 1983
Zoom lens
VIVITAR CORP2 citations63
US4159165AJun 26, 1979
Zoom lens
VIVITAR CORP4 citations63
US4145115AMar 20, 1979
Zoom lens
VIVITAR CORP3 citations63
BENOPCON INC
6 patentsUS5745301AApr 28, 1998
Variable power lens systems for producing small images
BENOPCON INC152 citations99
US5532875AJul 2, 1996
Wide angle binocular system with variable power capability
BENOPCON INC105 citations99
US5500769AMar 19, 1996
Wide angle binocular system with variable power capability
BENOPCON INC106 citations99
US5576888ANov 19, 1996
Wide angle binocular system with variable power capability
BENOPCON INC95 citations97
US5499140AMar 12, 1996
Wide angle binocular system with variable power capability
BENOPCON INC90 citations97
US5371626ADec 6, 1994
Wide angle binocular system with variable power capability
BENOPCON INC100 citations97
PONDER & BEST
3 patentsCONCORD CAMERA CORP
2 patentsPANAVISION INC
2 patentsOPCON ASSOCIATES OF CANADA LTD
2 patentsPOLAROID CORP
1 patentOPCON ASSOCIATES INC
1 patentPANAVISION INT LP
1 patentLENZAR OPTICS CORP
1 patentFJW IND INC
1 patentMINNESOTA MINING & MFG
1 patent(unassigned)
1 patentOPTIGON RES & DEV CORP
1 patentSTANLEY WORKS
1 patentHEWLETT PACKARD CO
1 patentShowing the top 50 of 51 patents by PatentIndex Score.