Inventor · disambiguated record
Toshiya Nagahama
Also filed as: NAGAHAMA TOSHIYA
9 granted patents·149 citations·filing 1988–2004
89Inventor score
Files withSHARP KK9
Top patents by PatentIndex Score
9 records- 0190US4904856AOptical pickup device with diffraction sensingSHARP KK·Filed 1988·Granted Feb 27, 1990·45 cites·5 claims
- 0282US5111449AOptical pick-up device using diffraction grating element having two sub-regionsSHARP KK·Filed 1990·Granted May 5, 1992·34 cites·8 claims
- 0378US5049732AOptical pickup device with diffraction deviceSHARP KK·Filed 1989·Granted Sep 17, 1991·20 cites·9 claims
- 0470US5408450AOptical pickup apparatusSHARP KK·Filed 1993·Granted Apr 18, 1995·19 cites·7 claims
- 0569US7483360B2Optical pickup device using polarizing hologram element and hologram laser thereforSHARP KK·Filed 2004·Granted Jan 27, 2009·8 cites·16 claims
- 0667US7649825B2Splitting element, light emitter, and optical pickup apparatusSHARP KK·Filed 2004·Granted Jan 19, 2010·7 cites·8 claims
- 0754USRE35332EOptical pickup device with diffraction deviceSHARP KK·Filed 1993·Granted Sep 24, 1996·8 cites·10 claims
- 0843US6847665B2Semiconductor laser device and method for producing the sameSHARP KK·Filed 2002·Granted Jan 25, 2005·3 cites·15 claims
- 0941US5272329AOptical pickup device using a holographic optical element and an amplifierSHARP KK·Filed 1991·Granted Dec 21, 1993·5 cites·13 claims
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →