Inventor · disambiguated record
Hiroo Ohkawa
Also filed as: OHKAWA HIROO
4 granted patents·95 citations·filing 1991–2001
78Inventor score
Files withHITACHI LTD4
Top patents by PatentIndex Score
4 records- 0175US5260542ALaser Marking apparatusHITACHI LTD·Filed 1991·Granted Nov 9, 1993·35 cites·9 claims
- 0271US5157235ALaser marking systemHITACHI LTD·Filed 1991·Granted Oct 20, 1992·29 cites·27 claims
- 0364US6290824B1Magnetic film forming systemHITACHI LTD·Filed 1993·Granted Sep 18, 2001·27 cites·15 claims
- 0456US6491802B2Magnetic film forming systemHITACHI LTD·Filed 2001·Granted Dec 10, 2002·4 cites·4 claims
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