Inventor · disambiguated record
Keiji Ohsawa
Also filed as: OHSAWA KEIJI
17 granted patents·160 citations·filing 1982–1995
93Inventor score
Top patents by PatentIndex Score
17 records- 0185US5361119AFocus state display device for cameraNIKON CORP·Filed 1993·Granted Nov 1, 1994·28 cites·4 claims
- 0282US5122827ACamera provided with an attitude detecting deviceNIKON CORP·Filed 1991·Granted Jun 16, 1992·24 cites·15 claims
- 0365US5499074AAutofocus cameraNIKON CORP·Filed 1995·Granted Mar 12, 1996·31 cites·11 claims
- 0465US4775229AFresnel lens in a finder optical systemNIPPON KOGAKU KK·Filed 1986·Granted Oct 4, 1988·24 cites·8 claims
- 0557US4833494ASingle lens reflex camera having replaceable view finderNIKON CORP·Filed 1988·Granted May 23, 1989·7 cites·7 claims
- 0647US5500708AFocus detection device having infrared filterNIKON CORP·Filed 1994·Granted Mar 19, 1996·13 cites·23 claims
- 0742US4972222AExposure controlling apparatus for cameraNIKON CORP·Filed 1989·Granted Nov 20, 1990·3 cites·14 claims
- 0841US5561492ACamera system using remote control unitNIKON CORP·Filed 1994·Granted Oct 1, 1996·3 cites·33 claims
- 0939US5393969ADevice for detecting focus at different areas of an image fieldNIKON CORP·Filed 1994·Granted Feb 28, 1995·8 cites·33 claims
- 1037US5530513AFocus detecting device and method of operationNIKON CORP·Filed 1994·Granted Jun 25, 1996·7 cites·27 claims
- 1133US4437747ADevice for mounting an electronic flash unitNIPPON KOGAKU KK·Filed 1982·Granted Mar 20, 1984·1 cites·8 claims
- 1232US5612762AFocus detection device for a cameraNIKON CORP·Filed 1995·Granted Mar 18, 1997·3 cites·13 claims
- 1331US5572013AFocus detection apparatus with a light shielding memberNIKON CORP·Filed 1995·Granted Nov 5, 1996·3 cites·14 claims
- 1430US5576896AStructure for attaching a lens to prevent distortion from changes in the ambient conditionsNIKON CORP·Filed 1994·Granted Nov 19, 1996·3 cites·13 claims
- 1529US5546157AFocus state detection deviceNIKON CORP·Filed 1994·Granted Aug 13, 1996·1 cites·16 claims
- 1629US5506399AFocus detection deviceNIKON CORP·Filed 1994·Granted Apr 9, 1996·1 cites·29 claims
- 1728US5500519AFocus detection device and method of adjusting focus detection device comprising independent pupil adjustment of moveable field lensesNIKON CORP·Filed 1994·Granted Mar 19, 1996·0 cites·13 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →