Inventor · disambiguated record
Kazumi Umezawa
Also filed as: HATTORI HIROYUKI · OGAWA HIROSHI · SHIMIZU KATSUICHI · UMEZAWA KAZUMI
38 granted patents·454 citations·filing 1974–1997
98Inventor score
Top patents by PatentIndex Score
38 records- 0192US4124296AOriginal urging deviceCANON KK·Filed 1977·Granted Nov 7, 1978·26 cites·5 claims
- 0288US4017170AElectrophotographic deviceCANON KK·Filed 1975·Granted Apr 12, 1977·20 cites·4 claims
- 0386US5894929AVacuum packaging bag and vacuum packaging methodKUSAKA RAREMETAL KENKYUSHO YK·Filed 1997·Granted Apr 20, 1999·88 cites·5 claims
- 0485US4154524ACopying apparatus for thick and sheet originalsCANON KK·Filed 1977·Granted May 15, 1979·14 cites·3 claims
- 0585US4110029ALiquid developer for an electrostatic copying deviceCANON KK·Filed 1975·Granted Aug 29, 1978·24 cites·16 claims
- 0685US3994582AOriginal keep device in copying machineCANON KK·Filed 1974·Granted Nov 30, 1976·13 cites·8 claims
- 0785US3957368AOptical system for copying sheet originals and thick orginalsCANON KK·Filed 1974·Granted May 18, 1976·21 cites·3 claims
- 0884US4234305ATransfer sheet guiding deviceCANON KK·Filed 1978·Granted Nov 18, 1980·23 cites·10 claims
- 0984US4155641AApparatus for scanning an original in a copying machineCANON KK·Filed 1978·Granted May 22, 1979·14 cites·18 claims
- 1077US4319828ACopying apparatus with a heated photosensitive drumCANON KK·Filed 1979·Granted Mar 16, 1982·12 cites·9 claims
- 1176US4734748AAuxiliary machine supporting structure for image forming apparatusCANON KK·Filed 1987·Granted Mar 29, 1988·21 cites·18 claims
- 1273US4158499ABuffer device for the scanning mechanism of an electrostatic copierCANON KK·Filed 1978·Granted Jun 19, 1979·8 cites·6 claims
- 1372US4437757AImage forming apparatus with cleaning meansCANON KK·Filed 1981·Granted Mar 20, 1984·12 cites·3 claims
- 1470US3948586AJam detecting device in a copying machineCANON KK·Filed 1974·Granted Apr 6, 1976·11 cites·4 claims
- 1569US4222659ACopying apparatus for sheet originals and thicker originalsCANON KK·Filed 1978·Granted Sep 16, 1980·9 cites·4 claims
- 1667US4205622AElectrophotographic developing apparatus having developer and refreshing rollers for liquid developersCANON KK·Filed 1978·Granted Jun 3, 1980·11 cites·14 claims
- 1761US5067306AProcess and apparatus for processing easy-opening bagASAHI CHEMICAL POLYFLEX CO LTD·Filed 1990·Granted Nov 26, 1991·20 cites·20 claims
- 1861US4330199AElectrophotographic deviceCANON KK·Filed 1979·Granted May 18, 1982·9 cites·6 claims
- 1960US4312587AImage forming apparatusCANON KK·Filed 1978·Granted Jan 26, 1982·12 cites·6 claims
- 2060US4192608ACopying apparatusCANON KK·Filed 1978·Granted Mar 11, 1980·9 cites·2 claims
- 2158US4270857ACopying apparatus for sheet originals and thicker originalsCANON KK·Filed 1978·Granted Jun 2, 1981·8 cites·25 claims
- 2256US4193483ALatch operated coil spring clutchCANON KK·Filed 1977·Granted Mar 18, 1980·9 cites·2 claims
- 2356US4071295ACopying apparatus for sheet originals and thicker originalsCANON KK·Filed 1975·Granted Jan 31, 1978·8 cites·3 claims
- 2454US4190464AMethod for cleaning a photoconductive surface with liquid tonerCANON KK·Filed 1977·Granted Feb 26, 1980·7 cites·29 claims
- 2552US4179116ASeparating mechanismCANON KK·Filed 1978·Granted Dec 18, 1979·6 cites·9 claims
- 2651US4896190AImage forming apparatus with batteryCANON KK·Filed 1988·Granted Jan 23, 1990·8 cites·14 claims
- 2750US4146324ALiquid developing device in electrophotographic copying apparatusCANON KK·Filed 1976·Granted Mar 27, 1979·6 cites·12 claims
- 2846US4013354AApparatus for separating transfer material in an electrostatic copying deviceCANON KK·Filed 1975·Granted Mar 22, 1977·5 cites·5 claims
- 2945US4763164AImage forming apparatusCANON KK·Filed 1984·Granted Aug 9, 1988·5 cites·5 claims
- 3040US4662740AElectrophotographic deviceCANON KK·Filed 1985·Granted May 5, 1987·3 cites·4 claims
- 3140US3999850AOptical system for an electrophotographic deviceCANON KK·Filed 1975·Granted Dec 28, 1976·2 cites·4 claims
- 3236US4421402AElectrophotographic deviceCANON KK·Filed 1980·Granted Dec 20, 1983·3 cites·13 claims
- 3336US4009955ACopying apparatus for sheet originals and thicker originalsCANON KK·Filed 1975·Granted Mar 1, 1977·2 cites·2 claims
- 3433US5420666AImage forming apparatus having start and stop keys integrally connected in the same matrix circuitCANON KK·Filed 1993·Granted May 30, 1995·1 cites·13 claims
- 3533US5117260AImage forming apparatus having streamlined input for control signalsCANON KK·Filed 1989·Granted May 26, 1992·2 cites·10 claims
- 3633US4185909ACleaning method and device for electrophotographic machineCANON KK·Filed 1977·Granted Jan 29, 1980·1 cites·51 claims
- 3732US4088872ARepeating mechanism for a copying apparatusCANON KK·Filed 1975·Granted May 9, 1978·1 cites·2 claims
- 3830US5223899AImage forming apparatus having stationary exposure mode and dynamic exposure modeCANON KK·Filed 1991·Granted Jun 29, 1993·0 cites·3 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →