Inventor · disambiguated record
Yutaka Ishizuka
Also filed as: ISHIZUKA YUTAKA
48 granted patents·2 pending applications·696 citations·filing 1975–2020
98Inventor score
Files withDIESEL KIKI CO26SANKYO SEIKI SEISAKUSHO KK14BOSCH GMBH ROBERT2TOSHIBA CERAMICS CO2ODAWARA ENGINEERING CO LTD1
Top patents by PatentIndex Score
50 records- 0191US4244680ARotary vane compressor with oil separating meansDIESEL KIKI CO·Filed 1979·Granted Jan 13, 1981·41 cites·6 claims
- 0284US3995976ARotary device with axially biased blade and rotor sectionsDIESEL KIKI CO·Filed 1975·Granted Dec 7, 1976·20 cites·10 claims
- 0383US4242065ASliding vane compressor with end face inserts or rotorBOSCH GMBH ROBERT·Filed 1978·Granted Dec 30, 1980·18 cites·10 claims
- 0482US4174931AVane for rotary compressorDIESEL KIKI CO·Filed 1977·Granted Nov 20, 1979·17 cites·10 claims
- 0580US5492229AVertical boat and a method for making the sameTOSHIBA CERAMICS CO·Filed 1993·Granted Feb 20, 1996·82 cites·18 claims
- 0676US5933267ARotary polygon mirror type light deflectorSANKYO SEIKI SISAKUSHO KK·Filed 1998·Granted Aug 3, 1999·52 cites·9 claims
- 0771US4480973AVane compressor provided with endless camming surface minimizing torque fluctuationsDIESEL KIKI CO·Filed 1982·Granted Nov 6, 1984·24 cites·10 claims
- 0870US4253809AVane compressor with rotor having metallic base and vane slots and a periphery of lower specific gravityDIESEL KIKI CO·Filed 1979·Granted Mar 3, 1981·11 cites·12 claims
- 0965US5606475AMagnetic disc drive motor including a fixed shaft having mounted thereon a lower bearing member with a portion for mounting a rotorSANYO SEIKI SEISAKUSHO KK·Filed 1995·Granted Feb 25, 1997·22 cites·1 claims
- 1064US4968160ACooling device for printer headDIESEL KIKI CO·Filed 1988·Granted Nov 6, 1990·13 cites·1 claims
- 1164US4144002ARotary compressorDIESEL KIKI CO·Filed 1977·Granted Mar 13, 1979·18 cites·4 claims
- 1263US5744881ASpindle motor, and its rotor yoke manufacturing methodSANKYO SEIKI SEISAKUSHO KK·Filed 1995·Granted Apr 28, 1998·27 cites·12 claims
- 1363US4480965ACapacity modulation device for compressorDIESEL KIKI CO·Filed 1982·Granted Nov 6, 1984·17 cites·4 claims
- 1463US4379425ADouble-acting piston for swash-plate type compressorsDIESEL KIKI CO·Filed 1980·Granted Apr 12, 1983·17 cites·14 claims
- 1563US4329129AVaned rotor for rotary mechanisms with bearings in vane slotsBOSCH GMBH ROBERT·Filed 1979·Granted May 11, 1982·9 cites·6 claims
- 1662US4416190ASeal for compressorDIESEL KIKI CO·Filed 1980·Granted Nov 22, 1983·19 cites·21 claims
- 1759US4501537AVane compressor having an endless camming surface minimizing torque fluctuationsDIESEL KIKI CO·Filed 1982·Granted Feb 26, 1985·16 cites·28 claims
- 1857US5638233AMagnetic disk drive motor having a fixed shaft with circumferential grooves for integrating the bearing therewith and having a disc abutting the outer ring of the bearingSANKYO SEIKI SEISAKUSHO KK·Filed 1995·Granted Jun 10, 1997·16 cites·4 claims
- 1957US5471357AMagnetic disk drive device having a liquid insulating material provided in different thicknesses on an iron coreSANKYO SEIKI SEISAKUSHO KK·Filed 1994·Granted Nov 28, 1995·10 cites·7 claims
- 2055US4571164AVane compressor with vane back pressure adjustmentDIESEL KIKI CO·Filed 1985·Granted Feb 18, 1986·12 cites·1 claims
- 2154US4636153ARotary compressor with blind hole in end wall that aligns with back pressure chamberDIESEL KIKI CO·Filed 1984·Granted Jan 13, 1987·12 cites·2 claims
- 2253US5653541ADisk driving motorSANKYO SEIKI SEISAKUSHO KK·Filed 1995·Granted Aug 5, 1997·10 cites·6 claims
- 2353US4401414ASwash-plate type compressor having a simple lubricant oil feeding arrangementDIESEL KIKI CO·Filed 1981·Granted Aug 30, 1983·12 cites·11 claims
- 2452US6087749ARotary polygonal mirror driving apparatusSANKYO SEIKI SEISAKUSHO KK·Filed 1998·Granted Jul 11, 2000·16 cites·11 claims
- 2552US4668172ACompressor having discharge valve means adapted to enhance the coefficient of performance of the compressorDIESEL KIKI CO·Filed 1985·Granted May 26, 1987·16 cites·11 claims
- 2651US5686771AElectric motorSANKYO SEIKI SEISAKUSHO KK·Filed 1995·Granted Nov 11, 1997·17 cites·4 claims
- 2751US5507873AVertical boatTOSHIBA CERAMICS CO·Filed 1995·Granted Apr 16, 1996·22 cites·17 claims
- 2847US5877918ADisk driving device with hub flange secured between yoke and drive magnetSANKYO SEIKI SEISAKUSHO KK·Filed 1997·Granted Mar 2, 1999·14 cites·21 claims
- 2946US4815362ADiffuser unit for air conditioning systemDIESEL KIKI CO·Filed 1987·Granted Mar 28, 1989·14 cites·5 claims
- 3045US6188155B1Spindle motorSANKYO SEIKI SEISAKUSHO KK·Filed 1999·Granted Feb 13, 2001·15 cites·12 claims
- 3144US4810177AVane compressor with vane back pressure adjustmentDIESEL KIKI CO·Filed 1987·Granted Mar 7, 1989·11 cites·1 claims
- 3243US6172439B1Motor rotor using a cylindrical yoke with slitSANKYO SEIKI SEISAKUSHO KK·Filed 1999·Granted Jan 9, 2001·11 cites·12 claims
- 3341US11677302B2Coil forming apparatus and coil forming methodODAWARA ENGINEERING CO LTD·Filed 2020·Granted Jun 13, 2023·0 cites·12 claims
- 3441US5666219ARotary polygon mirror type light deflecting systemSANKYO SEIKI SEISAKUSHO KK·Filed 1996·Granted Sep 9, 1997·9 cites·8 claims
- 3541US4805418AIndoor unit for room air conditionersDIESEL KIKI CO·Filed 1987·Granted Feb 21, 1989·10 cites·2 claims
- 3640US4502854AVane compressor having rearwardly located suction connector and discharge connectorDIESEL KIKI CO·Filed 1983·Granted Mar 5, 1985·7 cites·5 claims
- 3739US5450261AMagnetic disc drive motor having disc securely fixed to loading surface to abut upper bearing outer ringSANKYO SEIKI SEISA KUSHO KK·Filed 1993·Granted Sep 12, 1995·5 cites·4 claims
- 3838US2002048097A1Polygon mirrorFiled 2001·Application pending·0 cites
- 3936US5661588ARotary polygon mirror type light deflecting systemSANKYO SEIKI SEISAKUSHO KK·Filed 1995·Granted Aug 26, 1997·5 cites·4 claims
- 4035US5945752AShaft-fixed-type motorSANKYO SEIKI SEISAKUSHO KK·Filed 1997·Granted Aug 31, 1999·6 cites·11 claims
- 4135US2002060828A1Air dynamic pressure bearing and optical deflectorFiled 2001·Application pending·0 cites
- 4234US4511313ACompression capacity control apparatus for swash plate compressorDIESEL KIKI CO·Filed 1982·Granted Apr 16, 1985·3 cites·8 claims
- 4333US5675430ARotary polygon mirrorSANKYO SEIKI SEISAKUSHO KK·Filed 1995·Granted Oct 7, 1997·3 cites·9 claims
- 4433US4717321AVane compressor with vane back pressure adjustmentDIESEL KIKI CO·Filed 1986·Granted Jan 5, 1988·3 cites·3 claims
- 4532US5636084AMagnetic disk drive motor including a fixed shaft having mounted thereon a ball bearing with a rotor fixed at one end thereof and having a disc abutting the outer ring of the bearingSANKYO SEIKI SEISAKUSHO KK·Filed 1995·Granted Jun 3, 1997·3 cites·4 claims
- 4632US4611977AVane compressor with vane back pressure adjustmentDIESEL KIKI CO·Filed 1984·Granted Sep 16, 1986·2 cites·5 claims
- 4732US4392416ASwash-plate type compressor having low noise thrust bearingsDIESEL KIKI CO·Filed 1981·Granted Jul 12, 1983·3 cites·10 claims
- 4831US4549855ACompression capacity control apparatus for swash plate compressorDIESEL KIKI CO·Filed 1985·Granted Oct 29, 1985·1 cites·2 claims
- 4931US4394110ASwash-plate type compressorDIESEL KIKI CO·Filed 1980·Granted Jul 19, 1983·2 cites·5 claims
- 5030US4828019AIndoor unit for room air conditioners and air conditioning system using the sameDIESEL KIKI CO·Filed 1987·Granted May 9, 1989·3 cites·2 claims
Join the waitlist — get patent alerts
Get an alert when Yutaka Ishizuka 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 →