Inventor · disambiguated record
Hisao Ohtsuga
Also filed as: OHTSUGA HISAO
3 granted patents·169 citations·filing 1980–1985
77Inventor score
Technology areasF16L
Top patents by PatentIndex Score
3 records- 0186US4427480AMethod and apparatus for providing the inner surface of a pipe line with a tubular lining materialTOKYO GAS CO LTD·Filed 1983·Granted Jan 24, 1984·61 cites·17 claims
- 0281US4346922ADevice for preventing leakage at pipe jointsOHTSUGA HISAO·Filed 1980·Granted Aug 31, 1982·67 cites·11 claims
- 0374US4684556ATubular lining material for pipe lineTOKYO GAS CO LTD·Filed 1985·Granted Aug 4, 1987·41 cites·12 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →