Inventor · disambiguated record
Tadahiko Akiyama
Also filed as: AKIYAMA TADAHIKO
9 granted patents·923 citations·filing 1975–1995
92Inventor score
Files withNIPPO TSUSHIN KOGYO KK3HITACHI LTD1HITACHI TELECOM TECHNOLOGIED L1HITACHI TELECOMM TECH1NIPPO COMMUNICAT IND CO LTD1
Top patents by PatentIndex Score
9 records- 0196US4680785APersonal-signaling communication systemNIPPO TSUSHIN KOGYO KK·Filed 1984·Granted Jul 14, 1987·316 cites·4 claims
- 0294US4759056APersonal-servicing communication systemNIPPO COMMUNICAT IND CO LTD·Filed 1984·Granted Jul 19, 1988·164 cites·7 claims
- 0394US4736405ACommunication system with operation-procedure guiding function by speechHITACHI TELECOMM TECH·Filed 1985·Granted Apr 5, 1988·193 cites·17 claims
- 0491US4720848ACommunication system with voice announcement meansNIPPO COMMUNICATION IND CO·Filed 1984·Granted Jan 19, 1988·128 cites·9 claims
- 0580US3980834AMulti-stage connection switch frameHITACHI LTD·Filed 1975·Granted Sep 14, 1976·20 cites·5 claims
- 0677US4961217APersonal-servicing communication systemHITACHI TELECOM TECHNOLOGIED L·Filed 1988·Granted Oct 2, 1990·52 cites·4 claims
- 0763US5153906APersonal-servicing communication systemNIPPO COMMUNICATION IND CO LTD·Filed 1990·Granted Oct 6, 1992·32 cites·7 claims
- 0844US5440625APersonal-servicing communication systemNIPPO TSUSHIN KOGYO KK·Filed 1992·Granted Aug 8, 1995·11 cites·3 claims
- 0939US5524049APersonal-servicing communication systemNIPPO TSUSHIN KOGYO KK·Filed 1995·Granted Jun 4, 1996·7 cites·6 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →