Inventor · disambiguated record
Masaaki Hirooka
Also filed as: HIROOKA MASAAKI
45 granted patents·1,228 citations·filing 1973–1995
98Inventor score
Top patents by PatentIndex Score
45 records- 0196US4759947AMethod for forming deposition film using Si compound and active species from carbon and halogen compoundCANON KK·Filed 1985·Granted Jul 26, 1988·134 cites·11 claims
- 0295US4554180AProcess for producing silicon-containing deposit filmCANON KK·Filed 1984·Granted Nov 19, 1985·104 cites·3 claims
- 0393US4835005AProcess for forming deposition filmCANON KK·Filed 1988·Granted May 30, 1989·106 cites·22 claims
- 0490US5482557ADevice for forming deposited filmCANON KK·Filed 1994·Granted Jan 9, 1996·36 cites·12 claims
- 0589US4798166AApparatus for continuously preparing a light receiving element for use in photoelectromotive force member or image-reading photosensorCANON KK·Filed 1986·Granted Jan 17, 1989·67 cites·2 claims
- 0687US4803947AApparatus for forming deposited filmCANON KK·Filed 1987·Granted Feb 14, 1989·53 cites·17 claims
- 0786US4001159AAqueous dispersion of olefin-acrylate copolymerSUMITOMO CHEMICAL CO·Filed 1975·Granted Jan 4, 1977·40 cites·24 claims
- 0885US3957732AAlternating copolymers having functional group and process for producing sameSUMITOMO CHEMICAL CO·Filed 1974·Granted May 18, 1976·32 cites·21 claims
- 0984US5910342AProcess for forming deposition filmCANON KK·Filed 1995·Granted Jun 8, 1999·60 cites·16 claims
- 1082US4657777AFormation of deposited filmCANON KK·Filed 1986·Granted Apr 14, 1987·61 cites·23 claims
- 1180US4868014AMethod for forming thin film multi-layer structure memberCANON KK·Filed 1987·Granted Sep 19, 1989·54 cites·10 claims
- 1280US4000958AMethod for treating leatherSUMITOMO CHEMICAL CO·Filed 1975·Granted Jan 4, 1977·20 cites·48 claims
- 1376US3983058AProcess for preparing polyurethane emulsionsHODOGAYA CHEMICAL CO LTD·Filed 1974·Granted Sep 28, 1976·22 cites·9 claims
- 1475US5391232ADevice for forming a deposited filmCANON KK·Filed 1993·Granted Feb 21, 1995·43 cites·26 claims
- 1569US5366554ADevice for forming a deposited filmCANON KK·Filed 1993·Granted Nov 22, 1994·25 cites·16 claims
- 1666US4751192AProcess for the preparation of image-reading photosensorCANON KK·Filed 1986·Granted Jun 14, 1988·21 cites·6 claims
- 1765US3964955ABonding method using olefin-acrylic ester copolymerSUMITOMO CHEMICAL CO·Filed 1974·Granted Jun 22, 1976·11 cites·19 claims
- 1863US5160543ADevice for forming a deposited filmCANON KK·Filed 1992·Granted Nov 3, 1992·35 cites·4 claims
- 1962US3950281AElastomeric compositions containing olefin-acrylic ester copolymerSUMITOMO CHEMICAL CO·Filed 1974·Granted Apr 13, 1976·17 cites·49 claims
- 2061US4842897AMethod for forming deposited filmCANON KK·Filed 1986·Granted Jun 27, 1989·27 cites·12 claims
- 2159US4855210AElectrophotographic photosensitive member, process and apparatus for the preparation thereofCANON KK·Filed 1986·Granted Aug 8, 1989·11 cites·22 claims
- 2259US4042648AOlefin-acrylic ester copolymer-thermoplastic resin compositionSUMITOMO CHEMICAL CO·Filed 1973·Granted Aug 16, 1977·13 cites·21 claims
- 2358US4812331AMethod for forming deposited film containing group III or V element by generating precursors with halogenic oxidizing agentCANON KK·Filed 1986·Granted Mar 14, 1989·24 cites·6 claims
- 2457US4885258AMethod for making a thin film transistor using a concentric inlet feeding systemCANON KK·Filed 1988·Granted Dec 5, 1989·25 cites·10 claims
- 2557US4735822AMethod for producing an electronic device having a multi-layer structureCANON KK·Filed 1986·Granted Apr 5, 1988·22 cites·16 claims
- 2656US4844950AMethod for forming a metal film on a substrateCANON KK·Filed 1986·Granted Jul 4, 1989·16 cites·3 claims
- 2756US4804558AProcess for producing electroluminescent devicesCANON KK·Filed 1986·Granted Feb 14, 1989·14 cites·6 claims
- 2854US5322568AApparatus for forming deposited filmCANON KK·Filed 1992·Granted Jun 21, 1994·14 cites·13 claims
- 2952US4834023AApparatus for forming deposited filmCANON KK·Filed 1986·Granted May 30, 1989·14 cites·5 claims
- 3051US4798809AProcess for preparing photoelectromotive force memberCANON KK·Filed 1986·Granted Jan 17, 1989·11 cites·6 claims
- 3145US4824697AMethod for forming a multi-layer deposited filmCANON KK·Filed 1987·Granted Apr 25, 1989·10 cites·6 claims
- 3245US4517271AElectrophotographic CdS photosensitive member with acrylic resin binderCANON KK·Filed 1984·Granted May 14, 1985·5 cites·6 claims
- 3344US5645947ASilicon-containing deposited filmCANON KK·Filed 1995·Granted Jul 8, 1997·8 cites·9 claims
- 3444US4812328AMethod for forming deposited filmCANON KK·Filed 1986·Granted Mar 14, 1989·12 cites·20 claims
- 3541US4865883AMethod for forming a deposited film containing IN or SNCANON KK·Filed 1989·Granted Sep 12, 1989·8 cites·7 claims
- 3641US4822636AMethod for forming deposited filmCANON KK·Filed 1986·Granted Apr 18, 1989·10 cites·24 claims
- 3741US4801474AMethod for forming thin film multi-layer structure memberCANON KK·Filed 1987·Granted Jan 31, 1989·13 cites·7 claims
- 3840US4772570AMethod for producing an electronic device having a multi-layer structureCANON KK·Filed 1986·Granted Sep 20, 1988·10 cites·16 claims
- 3935US4559260AImage holding member having protective layersCANON KK·Filed 1982·Granted Dec 17, 1985·4 cites·7 claims
- 4035US4121032AProcess for preparing alternating copolymer of conjugated vinyl compound and olefinic unsaturated compound with oxygen and boron compoundSUMITOMO CHEMICAL CO·Filed 1975·Granted Oct 17, 1978·4 cites·4 claims
- 4133US5476694AMethod for forming deposited film by separately introducing an active species and a silicon compound into a film-forming chamberCANON KK·Filed 1995·Granted Dec 19, 1995·3 cites·16 claims
- 4233US4869931AMethod for forming deposited films of group II-VI compoundsCANON KK·Filed 1989·Granted Sep 26, 1989·3 cites·8 claims
- 4332US5470389AApparatus for forming deposited filmCANON KK·Filed 1994·Granted Nov 28, 1995·2 cites·8 claims
- 4432US4861623AMethod for forming deposited film by generating precursor with halogenic oxidizing agentCANON KK·Filed 1986·Granted Aug 29, 1989·3 cites·17 claims
- 4524US3989882AProcess for preparing an alternating copolymer of a conjugated vinyl compound and an olefinic unsaturated compoundSUMITOMO CHEMICAL CO·Filed 1975·Granted Nov 2, 1976·1 cites·15 claims
Join the waitlist — get patent alerts
Get an alert when Masaaki Hirooka files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →