Assignee
YAMASHINA SEIKOSHO KK
JP·6 granted patents·351 citations·filing 1977–1987
Top patents by PatentIndex Score
6 records- 0194US4241638ASelf-extruding fastenerYAMASHINA SEIKOSHO KK·Filed 1979·Granted Dec 30, 1980·97 cites·3 claims
- 0293US4842467AConcrete screwYAMASHINA SEIKOSHO KK·Filed 1987·Granted Jun 27, 1989·92 cites·13 claims
- 0392US4450616AMethod of ensuring the tightness of a bolt and a nutYAMASHINA SEIKOSHO KK·Filed 1982·Granted May 29, 1984·62 cites·2 claims
- 0492US4329099ASelf-drilling and self-extruding fastenerYAMASHINA SEIKOSHO KK·Filed 1980·Granted May 11, 1982·82 cites·9 claims
- 0538US4136597ADrill screw and die for producing sameYAMASHINA SEIKOSHO KK·Filed 1977·Granted Jan 30, 1979·10 cites·1 claims
- 0629US4599024AEntering end portion of drill screwYAMASHINA SEIKOSHO KK·Filed 1984·Granted Jul 8, 1986·8 cites·6 claims
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Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →