Inventor
SAKAI YOHEI
JP16 patents
⚠️ This page may combine multiple inventors who share the name “SAKAI YOHEI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
SEIKO EPSON CORP
7 patentsUS7922335B2Apr 12, 2011
Projector
SEIKO EPSON CORP19 citations92
USD607126SDec 29, 2009
Lamp for projector
SEIKO EPSON CORP8 citations84
US7535711B2May 19, 2009
Wind velocity measuring device and electronic apparatus
SEIKO EPSON CORP19 citations84
US7922331B2Apr 12, 2011
Polarization conversion unit, polarization conversion device, and projector
SEIKO EPSON CORP4 citations62
US11644737B2May 9, 2023
Projector device
SEIKO EPSON CORP0 citations52
US12479678B2Nov 25, 2025
Placement tray and recording device
SEIKO EPSON CORP0 citations51
US9575398B2Feb 21, 2017
Projector
SEIKO EPSON CORP0 citations41