Inventor
Kazuhisa Ishiguro
Inventor
Gunma, JP
Overview
Patents· 24 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
H03Fprimary
H03FAmplifiers24%
H04BTransmission22%
H03GControl of amplification17%
H03HImpedance networks, e.g. resonant circuits12%
H04WWireless communication networks5%
Y02DClimate change mitigation technologies in information and communication technologies [ict], i.e. information and communication technologies aiming at the reduction of their own energy use5%
H03BGeneration of oscillations, directly or by frequency-changing, by circuits employing active elements which operate in a non-switching manner2%
H03DDemodulation or transference of modulation from one carrier to another2%
H03JTuning resonant circuits2%
H03KPulse technique2%
PatentTitleYear
8,284,876'Automatic gain control circuit'20127,991,371'Automatic gain control apparatus for wireless communication apparatus'20117,868,695'Differential amplifier'20117,852,967'Automatic power output control circuit'20107,848,721'Antenna damping circuit and high frequency receiver employing same'20107,843,258'Filter circuit'20107,812,685'Automatic regulator of filter'20107,795,979'Automatic gain control circuit and low noise amplifying circuit'20107,639,085'Automatic gain control circuit'20097,602,248'Power amplifier and its idling current setting circuit'20095,940,428'Spread spectrum signal receiving apparatus'19995,903,593'Spread spectrum signal receiver'19995,087,890'Amplifier circuit'19925,068,544'FSK data waveform shaping circuit'19915,065,112'Amplification circuit with improved linearity'19915,027,428'Power saving arrangement and power saving method'19915,014,017'Power-saving low-frequency power amplifier'19914,990,872'Variable reactance circuit producing negative to positive varying reactance'19914,972,482'Fm stereo demodulator'19904,944,010'Stereo demodulator and a demodulating method thereof'19904,864,637'FMX stereophonic broadcast receiver'19894,852,167'FMX stereophonic receiver'19894,809,328'FM/FMX stereophonic receiver'19894,587,500'Variable reactance circuit producing negative to positive varying reactance'1986Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1986–1999Patents assigned to SANYO ELECTRIC CO (14)· patent assignee history
1986–2012Based in Ota, JP· patent location history
1989–2011Based in Gunma, JP· patent location history
1989–1991Based in Nitta-gun, JP· patent location history
2009–2010Patents assigned to RICOH KK (4)· patent assignee history
2009Patents assigned to NIIGATA SEIMITSU CO LTD (1)· patent assignee history
2010–2012Patents assigned to RICOH CO LTD (6)· patent assignee history
2012Patents assigned to ISHIGURO KAZUHISA (1)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| SANYO ELECTRIC CO | 14 | 1986–1999 |
| RICOH CO LTD | 6 | 2010–2012 |
| RICOH KK | 4 | 2009–2010 |
| ISHIGURO KAZUHISAself | 1 | 2012 |
| NIIGATA SEIMITSU CO LTD | 1 | 2009 |
Locations
| Location | Patents | Span |
|---|---|---|
| Gunma, JP | 16 | 1989–2011 |
| Ota, JP | 4 | 1986–2012 |
| Nitta-gun, JP | 4 | 1989–1991 |