Inventor · disambiguated record
Hiroo Hiroyama
Also filed as: HIROYAMA HIROO
5 granted patents·125 citations·filing 1975–1995
83Inventor score
Files withHITACHI LTD5
Top patents by PatentIndex Score
5 records- 0186US4938611ABearing apparatusHITACHI LTD·Filed 1989·Granted Jul 3, 1990·43 cites·20 claims
- 0280US5325006ASealed magnetic fluid bearing for polygon mirror drive motorHITACHI LTD·Filed 1991·Granted Jun 28, 1994·42 cites·9 claims
- 0369US5493161ASealed magnetic fluid bearing for polygon mirror drive motorHITACHI LTD·Filed 1994·Granted Feb 20, 1996·23 cites·13 claims
- 0450USRE35718EBearing apparatusHITACHI LTD·Filed 1995·Granted Jan 27, 1998·13 cites·22 claims
- 0529US4093320AGrooved spherical bearing for vertical machinesHITACHI LTD·Filed 1975·Granted Jun 6, 1978·4 cites·19 claims
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