Assignee
SIGMA CO LTD
JP·4 granted patents·30 citations·filing 1989–2007
Top patents by PatentIndex Score
4 records- 0152US7934908B2Impeller manufacturing method and impellerSIGMA CO LTD·Filed 2007·Granted May 3, 2011·0 cites·13 claims
- 0248US4976529ASoldering material for spectacle frame and spectacle frame in which said soldering material is usedSIGMA CO LTD·Filed 1989·Granted Dec 11, 1990·17 cites·7 claims
- 0344US8033793B2ImpellerSIGMA CO LTD·Filed 2007·Granted Oct 11, 2011·0 cites·19 claims
- 0441US4953966ASpectacle frameSIGMA CO LTD·Filed 1989·Granted Sep 4, 1990·13 cites·3 claims
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