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KAMIJO YUJI

Overview
  • Total Patents
    17
  • GoodIP Patent Rank
    185,915
  • Filing trend
    ⇧ 100.0%
About

KAMIJO YUJI has a total of 17 patent applications. It increased the IP activity by 100.0%. Its first patent ever was published in 1985. It filed its patents most often in Japan. Its main competitors in its focus markets audio-visual technology are SFX TECHNOLOGIES LTD, EASTERN ACOUSTIC WORKS INC and SUZHOU YICHUAN ACOUSTICS TECH CO LTD.

Patent filings in countries

World map showing KAMIJO YUJIs patent filings in countries
# Country Total Patents
#1 Japan 17

Patent filings per year

Chart showing KAMIJO YUJIs patent filings per year from 1900 to 2020

Focus industries

Focus technologies

Top inventors

# Name Total Patents
#1 Kamijo Yuji 17

Latest patents

Publication Filing date Title
JP2020072364A Sound absorbing curved diaphragm for speaker cabinet
JP2019201304A Audio signal reflection current prevention circuit
JP2019029881A Phase inversion diaphragm of speaker
JP2017168949A Mutual inductance circuit of power supply of audio equipment
JP2017021457A Transformer input smoothing circuit
JP2016219621A Mutual inductance circuit of AC power supply for audio
JP2016015662A Power supply circuit of speaker minimum resonance frequency with transformer
JP2015026932A Silent diaphragm unit for loudspeaker
JP2014039147A Split vibration-loss fin-attached diaphragm for speaker
JP2005110192A Electric conductor for speaker control
JP2002101494A Displacement vibrator control speaker
JPH08307984A Linkage phase reverse type and spiral driving type speaker
JPH0470096A After-effect air flow converting speaker
JPH01264098A Fluid type silencer for speaker
JPS63309094A Sound pressure flow conversion type sound box
JPS62160903A Spike retractable tire
JPS61196696A Sound pressure drift conversion type acoustic box