Assignee
RIKEN PISTON RING IND CO LTD
7 granted patents·105 citations·filing 1973–1979
Top patents by PatentIndex Score
7 records- 0175US4233073AIron-base sintered alloy for valve seat and method of making the sameRIKEN PISTON RING IND CO LTD·Filed 1978·Granted Nov 11, 1980·20 cites·2 claims
- 0267US4096002AHigh duty ductile cast iron with superplasticity and its heat treatment methodsRIKEN PISTON RING IND CO LTD·Filed 1975·Granted Jun 20, 1978·13 cites·9 claims
- 0363US4098515AAbrasion resisting material and use of the sameRIKEN PISTON RING IND CO LTD·Filed 1976·Granted Jul 4, 1978·19 cites·6 claims
- 0462US3947046AOil seal ring for internal combustion engineRIKEN PISTON RING IND CO LTD·Filed 1973·Granted Mar 30, 1976·18 cites·3 claims
- 0560US4074956ASulphur and nitrogen treated iron based rotor for rotary piston engineRIKEN PISTON RING IND CO LTD·Filed 1976·Granted Feb 21, 1978·17 cites·6 claims
- 0659US4099994AHigh duty ductile case iron and its heat treatment methodRIKEN PISTON RING IND CO LTD·Filed 1977·Granted Jul 11, 1978·10 cites·3 claims
- 0745US4244305AFluidized bed incineratorRIKEN PISTON RING IND CO LTD·Filed 1979·Granted Jan 13, 1981·8 cites·7 claims
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Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →