Inventor · disambiguated record
Tetsushi Ohtsuka
Also filed as: OHTSUKA TETSUSHI
4 granted patents·60 citations·filing 1994–2006
77Inventor score
Top patents by PatentIndex Score
4 records- 0173US5615701AVacuum valve control device and vacuum valveSEIKISUI CHEMICAL CO LTD·Filed 1994·Granted Apr 1, 1997·31 cites·11 claims
- 0264US7950911B2Single stage root type-vacuum pump and vacuum fluid transport system employing the single stage root type-vacuum pumpSEKISUI CHEMICAL CO LTD·Filed 2006·Granted May 31, 2011·4 cites·7 claims
- 0353US5918853AVacuum valve control device and vacuum valveSEIKISUI KAGAKU KOGYO KABUSHIK·Filed 1996·Granted Jul 6, 1999·16 cites·1 claims
- 0441US6298870B1Vacuum-operated sewage system and air inlet valveSEKISUI CHEMICAL CO LTD·Filed 1999·Granted Oct 9, 2001·9 cites·7 claims
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