Inventor · disambiguated record
Akira Oka
Also filed as: OKA AKIRA
29 granted patents·7 pending applications·493 citations·filing 1974–2025
96Inventor score
Files withFUJITSU OPTICAL COMPONENTS LTD16FUJIKURA LTD13FUJITSU LTD3KOMATSU MFG CO LTD2OMRON TATEISI ELECTRONICS CO2
Top patents by PatentIndex Score
36 records- 0196US11223425B2Optical circuit device, and optical receiverFUJITSU OPTICAL COMPONENTS LTD·Filed 2021·Granted Jan 11, 2022·5 cites·10 claims
- 0296US9529151B2Polarization conversion elementFUJIKURA LTD·Filed 2015·Granted Dec 27, 2016·21 cites·17 claims
- 0396US9500807B2Planar optical waveguide element, dual polarization quadrature phase shift keying modulator, coherent receiver, and polarization diversityFUJIKURA LTD·Filed 2015·Granted Nov 22, 2016·21 cites·14 claims
- 0495US4226491AElectronic device having a printed circuit board unit thereinFUJITSU LTD·Filed 1979·Granted Oct 7, 1980·152 cites·8 claims
- 0594US9557482B2High-order polarization conversion device, optical waveguide device, and DP-QPSK modulatorFUJIKURA LTD·Filed 2015·Granted Jan 31, 2017·15 cites·10 claims
- 0694US3958103AAutomatic ticket vending systemOMRON TATEISI ELECTRONICS CO·Filed 1974·Granted May 18, 1976·110 cites·2 claims
- 0793US3984660AApparatus for issuing a card having a predetermined monetary valueOMRON TATEISI ELECTRONICS CO·Filed 1974·Granted Oct 5, 1976·85 cites·20 claims
- 0890US9851504B2Planar optical waveguide device, DP-QPSK modulator, coherent receiver, and polarization diversityFUJIKURA LTD·Filed 2016·Granted Dec 26, 2017·8 cites·20 claims
- 0986US9851505B2Substrate-type optical waveguide elementFUJIKURA LTD·Filed 2017·Granted Dec 26, 2017·5 cites·19 claims
- 1086US9835798B2Planar optical waveguide device, polarization multiplexing 4-value phase modulator, coherent receiver, and polarization diversityFUJIKURA LTD·Filed 2017·Granted Dec 5, 2017·5 cites·15 claims
- 1183US9874692B2Substrate-type optical waveguide element and method for producing substrate-type optical waveguide elementFUJIKURA LTD·Filed 2017·Granted Jan 23, 2018·4 cites·16 claims
- 1283US9304254B2Substrate-type waveguide element and optical modulatorFUJIKURA LTD·Filed 2015·Granted Apr 5, 2016·4 cites·10 claims
- 1380US9810842B2Substrate-type optical waveguide elementFUJIKURA LTD·Filed 2017·Granted Nov 7, 2017·3 cites·12 claims
- 1479US9335472B2Planar optical waveguide device and DP-QPSK modulatorFUJIKURA LTD·Filed 2014·Granted May 10, 2016·4 cites·14 claims
- 1576US4496057ARack structure for mounting a communication apparatusFUJITSU LTD·Filed 1983·Granted Jan 29, 1985·36 cites·4 claims
- 1666US9784918B2Substrate-type optical waveguide elementFUJIKURA LTD·Filed 2017·Granted Oct 10, 2017·1 cites·10 claims
- 1764US12276832B2Optical device, substrate optical waveguide element, and optical communication apparatusFUJITSU OPTICAL COMPONENTS LTD·Filed 2023·Granted Apr 15, 2025·0 cites·9 claims
- 1863US9008476B2Polarization conversion deviceFUJIKURA LTD·Filed 2014·Granted Apr 14, 2015·1 cites·13 claims
- 1962US12021562B2Tap coupler, optical communication apparatus, and optical branching methodFUJITSU OPTICAL COMPONENTS LTD·Filed 2022·Granted Jun 25, 2024·0 cites·11 claims
- 2061US2024377584A1Optical device and optical receiverFUJITSU OPTICAL COMPONENTS LTD·Filed 2024·Application pending·0 cites
- 2161US2025347851A1Optical device, optical transmitter, and optical receiverFUJITSU OPTICAL COMPONENTS LTD·Filed 2025·Application pending·0 cites
- 2261US2024377594A1Optical device, optical transmitting apparatus, and optical receiving apparatusFUJITSU OPTICAL COMPONENTS LTD·Filed 2024·Application pending·0 cites
- 2360US2024230987A1Optical device, optical transmitter device, and optical receiver deviceFUJITSU OPTICAL COMPONENTS LTD·Filed 2023·Application pending·0 cites
- 2459US11543593B2Optical device, and light source module using the sameFUJITSU OPTICAL COMPONENTS LTD·Filed 2021·Granted Jan 3, 2023·0 cites·10 claims
- 2559US2025012627A1Optical detector, optical receiver, and optical transceiverFUJITSU OPTICAL COMPONENTS LTD·Filed 2024·Application pending·0 cites
- 2657US11307355B290-degree optical hybridFUJITSU OPTICAL COMPONENTS LTD·Filed 2021·Granted Apr 19, 2022·0 cites·9 claims
- 2756US12487400B2Optical device, substrate type optical waveguide element, optical communication apparatus, and inter-waveguide transition methodFUJITSU OPTICAL COMPONENTS LTD·Filed 2022·Granted Dec 2, 2025·0 cites·10 claims
- 2856US10422953B2Optical module and inputting methodFUJIKURA LTD·Filed 2018·Granted Sep 24, 2019·0 cites·8 claims
- 2955US11662522B2Optical waveguide device operated as mode converterFUJITSU OPTICAL COMPONENTS LTD·Filed 2021·Granted May 30, 2023·0 cites·9 claims
- 3054US2023056455A1Optical waveguide element, optical communication apparatus, and method of eliminating slab modeFUJITSU OPTICAL COMPONENTS LTD·Filed 2022·Application pending·0 cites
- 3153US11714234B2Optical waveguide device that converts polarization of lightFUJITSU OPTICAL COMPONENTS LTD·Filed 2021·Granted Aug 1, 2023·0 cites·10 claims
- 3253US11460635B2Optical waveguide deviceFUJITSU OPTICAL COMPONENTS LTD·Filed 2021·Granted Oct 4, 2022·0 cites·10 claims
- 3352US12184338B2Optical 90-degree hybridFUJITSU OPTICAL COMPONENTS LTD·Filed 2022·Granted Dec 31, 2024·0 cites·4 claims
- 3447US2024355155A1State estimation system, dump truck, and state estimation methodKOMATSU MFG CO LTD·Filed 2022·Application pending·0 cites
- 3544US4510552ADevice for housing communication circuits and equipmentFUJITSU LTD·Filed 1982·Granted Apr 9, 1985·13 cites·5 claims
- 3641US11927125B2Prediction device, prediction method, and work vehicleKOMATSU MFG CO LTD·Filed 2020·Granted Mar 12, 2024·0 cites·14 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →