Toshiaki Hashizume has been granted 89 US patents while listed as an inventor at Seiko Epson . The first was granted in 1995 and the most recent in June 2025. Toshiaki Hashizume ranks #18,310 of 4,157,543 US inventors in our database (top 0.44%). Patent records list Toshiaki Hashizume in Okaya, JP.
Patents per Year Patents granted per year, 1995 to 2025 Bar chart with a peak of 10 patents in 2000. peak 10 1995: 1 patents 1995 1996: 1 patents 1997: 1 patents 1998: 1 patents 1998 1999: 7 patents 2000: 10 patents 2001: 3 patents 2001 2002: 7 patents 2003: 5 patents 2004: 6 patents 2004 2005: 6 patents 2006: 7 patents 2007: 3 patents 2007 2008: 3 patents 2009: 4 patents 2010: 2 patents 2010 2011: 3 patents 2014: 3 patents 2016: 2 patents 2016 2018: 3 patents 2019: 2 patents 2020: 2 patents 2020 2021: 2 patents 2022: 1 patents 2023: 1 patents 2023 2024: 2 patents 2025: 1 patents 2025 Issued Patents All Time
Showing 1–25 of 89 patents
Patent # Title Co-Inventors Date Approx Value ⓘ
12321089 Wavelength conversion element, light source device, and projector — 2025-06-03
12072616 Wavelength conversion device, light source device, and projector — 2024-08-27
11868034 Phosphor particle, wavelength conversion element, light source device, method of manufacturing phosphor particle, method of manufacturing wavelength conversion element, and projector — 2024-01-09
11572502 Wavelength conversion element, light source device, projector, and method of manufacturing wavelength conversion element — 2023-02-07
11237469 Wavelength conversion element, light source device, and projector — 2022-02-01
11172176 Wavelength conversion element, light source device, projector, and method of manufacturing wavelength conversion element — 2021-11-09
10942433 Light source device and projector — 2021-03-09
10721446 Wavelength conversion element, light source apparatus, and projector — 2020-07-21
10539862 Wavelength conversion element, wavelength converter, light source apparatus, and projector — 2020-01-21
10379284 Light source device and projector Ryuta Koizumi 2019-08-13
10261402 Light source device and projector Ryuta Koizumi 2019-04-16
10101645 Wavelength conversion element, light source device, and projector Kunihiko Takagi , Tetsuo Shimizu , Osamu Arakawa 2018-10-16
9964842 Light source apparatus and projector — 2018-05-08
9955129 Light source device and projector — 2018-04-24
9475983 Fluorescence light emitting element comprising a phosphor layer including phosphors and a binder made of an inorganic material Kiyoshi Kuroi 2016-10-25
9423680 Light source apparatus that irradiates a phosphor layer with excitation light and projector Hidefumi Sakata , Wataru YASUMATSU 2016-08-23
8780444 Screen and projection system Osamu Arakawa , Hiroyuki Shindo , Tatsuo Uchida , Yoshito Suzuki , Baku Katagiri 2014-07-15
8714747 Projector having a first light separation optical system and a second light separation optical system Koichi Akiyama 2014-05-06
8654442 Refelctive front screen Tatsuo Uchida , Yoshito Suzuki , Baku Katagiri , Hiroyuki Shindo , Osamu Arakawa 2014-02-18
RE42740 Projector Motoyuki Fujimori , Kenji Iguchi , Kiichi Okumura 2011-09-27
8023186 Screen Ryoji Katsuma , Akira Shinbo 2011-09-20
RE42515 Method of manufacturing reflective mirror, illumination device, and projector — 2011-07-05
RE41874 Method of manufacturing reflective mirror, illumination device, and projector — 2010-10-26
RE41680 Projector Hisashi Iechika , Yasunori Ogawa , Shinji Haba , Akitaka Yajima 2010-09-14
7593076 Optical device and method for manufacturing optical device Hiroaki Yanai 2009-09-22