Inventor · disambiguated record
Fujio Sumi
Also filed as: SUMI FUJIO
6 granted patents·86 citations·filing 1990–1994
83Inventor score
Top patents by PatentIndex Score
6 records- 0165US5493698ARadio apparatus for simulataneously transmitting and receiving signals using a simple frequencyHITACHI ELECTRONICS·Filed 1994·Granted Feb 20, 1996·38 cites·7 claims
- 0252US5633862ADTMF signal transmission method in single frequency simultaneous transmitting and receiving system and single frequency simultaneous transmitting and receiving system transceiver capable of transmitting DTMF signalHITACHI ELECTRONICS·Filed 1994·Granted May 27, 1997·21 cites·9 claims
- 0340US5524274ATransceiver controlled by absence/presence of input signalHITACHI ELECTRONICS·Filed 1994·Granted Jun 4, 1996·11 cites·4 claims
- 0435US5355363AVoice transmission method and apparatus in duplex radio systemHITACHI ELECTRONICS·Filed 1993·Granted Oct 11, 1994·9 cites·10 claims
- 0530US5697049ARadio relay method, radio relay system using the method and radio unitHITACHI ELECTRONICS·Filed 1994·Granted Dec 9, 1997·3 cites·3 claims
- 0621US5490167ADuplex voice communication radio transmitter-receiverTOUHOKU DENRYOKU KABUSHIKI KAI·Filed 1990·Granted Feb 6, 1996·4 cites·10 claims
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →