Inventor · disambiguated record
Keiko Kumagai
Also filed as: KUMAGAI KEIKO
5 granted patents·22 citations·filing 1997–2009
72Inventor score
Top patents by PatentIndex Score
5 records- 0185US7899094B2Laser light source device, illumination device, image display device, and monitor deviceSEIKO EPSON CORP·Filed 2009·Granted Mar 1, 2011·9 cites·15 claims
- 0254US7561604B2Laser light source device, illumination device, image display device, and monitor deviceSEIKO EPSON CORP·Filed 2008·Granted Jul 14, 2009·0 cites·20 claims
- 0353US7561612B2Laser source device, image display device equipped with the laser source device, and monitor deviceSEIKO EPSON CORP·Filed 2006·Granted Jul 14, 2009·1 cites·16 claims
- 0444US7817334B2Wavelength conversion element, light source device, image display device, and monitor deviceSEIKO EPSON CORP·Filed 2008·Granted Oct 19, 2010·0 cites·15 claims
- 0536US6205156B1Method and device for data transmission and reception using transmission pause state as reception timingNIPPON TELEGRAPH & TELEPHONE·Filed 1997·Granted Mar 20, 2001·12 cites·7 claims
Join the waitlist — get patent alerts
Get an alert when Keiko Kumagai files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →