Inventor
ONITSUKA HIROFUMI
JP21 patents
⚠️ This page may combine multiple inventors who share the name “ONITSUKA HIROFUMI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
YAMAHA CORP
15 patentsUS7095865B2Aug 22, 2006
Audio amplifier unit
YAMAHA CORP30 citations92
US11240592B2Feb 1, 2022
Bass reflex port and acoustic device
YAMAHA CORP2 citations72
US9473847B2Oct 18, 2016
Acoustic apparatus
YAMAHA CORP4 citations71
US10750273B2Aug 18, 2020
Bass reflex port and bass reflex type speaker
YAMAHA CORP1 citations62
USD752560SMar 29, 2016
Port for audio equipment
YAMAHA CORP1 citations62
USD752559SMar 29, 2016
Port for audio equipment
YAMAHA CORP1 citations62
USD752561SMar 29, 2016
Port for audio equipment
YAMAHA CORP1 citations62
USD750599SMar 1, 2016
Port for audio equipment
YAMAHA CORP2 citations62
USD750048SFeb 23, 2016
Port for audio equipment
YAMAHA CORP1 citations62
US9241211B2Jan 19, 2016
Tubular body, bass reflex port, and acoustic apparatus
YAMAHA CORP2 citations62
USD745492SDec 15, 2015
Port for audio equipment
YAMAHA CORP2 citations62
US9232300B2Jan 5, 2016
Bass reflex port and tubular body
YAMAHA CORP1 citations52
US9275612B2Mar 1, 2016
Keyboard instrument
YAMAHA CORP1 citations50
US10045119B2Aug 7, 2018
Acoustic structure and acoustic panel
YAMAHA CORP0 citations48
US9407983B2Aug 2, 2016
Microphone device
YAMAHA CORP1 citations45