Inventor · disambiguated record
Masao Hirayama
Also filed as: HIRAYAMA MASAO
4 granted patents·245 citations·filing 1980–1991
82Inventor score
Top patents by PatentIndex Score
4 records- 0195US4350548AMethod and apparatus for providing the inner surface of a pipe line with a liningTOKYO GAS CO LTD·Filed 1981·Granted Sep 21, 1982·94 cites·14 claims
- 0285US4334943AMethod for smoothly evaginating a tubular material under pressureTOKYO GAS CO LTD·Filed 1980·Granted Jun 15, 1982·55 cites·15 claims
- 0378US5310593AAdsorbentOSAKA GAS CO LTD·Filed 1991·Granted May 10, 1994·51 cites·12 claims
- 0475US5308703AAdsorbent having good heat conductivityOSAKA GAS CO LTD·Filed 1991·Granted May 3, 1994·45 cites·17 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →