Inventor · disambiguated record
Takaichi Koyama
Also filed as: KOYAMA TAKAICHI
4 granted patents·197 citations·filing 1977–1981
81Inventor score
Files withHITACHI LTD4
Top patents by PatentIndex Score
4 records- 0194US4311556AMethod and system for inspection of inside of nuclear reactor vesselHITACHI LTD·Filed 1979·Granted Jan 19, 1982·78 cites·15 claims
- 0294US4144992AMethod for controlling an automatic pipe welderHITACHI LTD·Filed 1977·Granted Mar 20, 1979·75 cites·8 claims
- 0392US4440339AMethod of repairing housing of control rod driving systemHITACHI LTD·Filed 1981·Granted Apr 3, 1984·39 cites·9 claims
- 0442US4262517AMethod of correcting distorted pipe endHITACHI LTD·Filed 1979·Granted Apr 21, 1981·5 cites·5 claims
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