Assignee
RICOH OPTICAL IND CO
JP·4 granted patents·1 pending application·68 citations·filing 1996–2004
Top patents by PatentIndex Score
5 records- 0172US5830605AGradation mask method of producing the same and method of forming special surface profile on material using gradation maskRICOH OPTICAL IND CO·Filed 1996·Granted Nov 3, 1998·44 cites·25 claims
- 0268US7195732B2Method and mold for fabricating article having fine surface structureRICOH OPTICAL IND CO·Filed 2003·Granted Mar 27, 2007·9 cites·25 claims
- 0345US5776639AExposure mask, method of producing the same, exposure mask producing apparatus, and method of forming surface profile on material using exposure maskRICOH OPTICAL IND CO·Filed 1996·Granted Jul 7, 1998·12 cites·6 claims
- 0440US7050238B2Power combination optical system and light source moduleRICOH OPTICAL IND CO·Filed 2004·Granted May 23, 2006·3 cites·21 claims
- 0538US2004174596A1Polarization optical device and manufacturing method thereforRICOH OPTICAL IND CO·Filed 2004·Application pending·0 cites
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Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →