Inventor · disambiguated record
Hirotoshi Shirasu
Also filed as: SHIRASU HIROTOSHI
15 granted patents·152 citations·filing 1974–1989
92Inventor score
Top patents by PatentIndex Score
15 records- 0180US4543652ATime-division switching unitHITACHI LTD·Filed 1983·Granted Sep 24, 1985·31 cites·15 claims
- 0273US4633460ATime division switching systemHITACHI LTD·Filed 1984·Granted Dec 30, 1986·21 cites·9 claims
- 0363US4608464AInterface circuit interconnecting a bidirectional two-wire line with unidirectional four-wire linesNIPPON TELEGRAPH & TELEPHONE·Filed 1984·Granted Aug 26, 1986·23 cites·2 claims
- 0462US4841521AMethod and system for bidirectionally transmitting dataHITACHI LTD·Filed 1987·Granted Jun 20, 1989·25 cites·14 claims
- 0550US4231022AInterpolative PCM decoder utilized for μ-law and A-lawHITACHI LTD·Filed 1978·Granted Oct 28, 1980·7 cites·3 claims
- 0645US4276447ASignal processing apparatus for subscriber circuitsHITACHI LTD·Filed 1979·Granted Jun 30, 1981·3 cites·7 claims
- 0745US4261051ATime-division-multiplexed exchangerHITACHI LTD·Filed 1979·Granted Apr 7, 1981·8 cites·4 claims
- 0842US4558185ASubscriber line interface circuit with complex impedanceNIPPON TELEGRAPH & TELEPHONE·Filed 1982·Granted Dec 10, 1985·9 cites·8 claims
- 0940US4901274AMethod and system for data driven information processingHITACHI LTD·Filed 1985·Granted Feb 13, 1990·11 cites·8 claims
- 1038US4603417APCM coder and decoderHITACHI LTD·Filed 1984·Granted Jul 29, 1986·4 cites·9 claims
- 1134US4663759ARing back tone transmission systemHITACHI LTD·Filed 1985·Granted May 5, 1987·3 cites·12 claims
- 1234US4035586ACurrent supply system for terminal devicesHITACHI LTD·Filed 1976·Granted Jul 12, 1977·3 cites·3 claims
- 1331US5185873AControl system with flag indicating two or less data inputs and counter indicating two or more controlling data driven execution methodHITACHI LTD·Filed 1989·Granted Feb 9, 1993·3 cites·23 claims
- 1425US4039758ALine identifying system of common control type automatic exchangeHITACHI LTD·Filed 1976·Granted Aug 2, 1977·1 cites·8 claims
- 1522US3967071ASwitching system of stored program control typeHITACHI LTD·Filed 1974·Granted Jun 29, 1976·0 cites·7 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →