Yokoyama: Yukio

Person

Tokyo, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Piezoelectric acoustic device and electronic apparatus
- Patent number 8,385,578
- Issue date Feb 26, 2013
- NEC Corporation
- Yasuharu Onishi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Cellular phone
- Patent number 8,200,297
- Issue date Jun 12, 2012
- NEC Corporation
- Eiji Hankui
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Piezoelectric actuator and electronic apparatus
- Patent number 8,148,876
- Issue date Apr 3, 2012
- NEC Corporation
- Yasuharu Onishi
- B06 - GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
Information Patent Grant
Antenna for portable radio unit
- Patent number 5,926,140
- Issue date Jul 20, 1999
- NEC Corporation
- Yukio Yokoyama
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Two-frequency impedance matching circuit for an antenna
- Patent number 5,493,311
- Issue date Feb 20, 1996
- NEC Corporation
- Ryoh Itoh
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Antenna for portable radio communication apparatus
- Patent number 5,455,595
- Issue date Oct 3, 1995
- NEC Corporation
- Yukio Yokoyama
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Antenna for a radio communication apparatus
- Patent number 5,438,339
- Issue date Aug 1, 1995
- NEC Corporation
- Ryoh Itoh
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Portable radio with coplanar ground and atenna conductive films for...
- Patent number 5,394,160
- Issue date Feb 28, 1995
- NEC Corporation
- Hiroyuki Iwasaki
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Portable radio communication apparatus unnecessitating shielding case
- Patent number 5,392,461
- Issue date Feb 21, 1995
- NEC Corporation
- Yokoyama: Yukio
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Broadband radio transceiver
- Patent number 5,375,256
- Issue date Dec 20, 1994
- NEC Corporation
- Yukio Yokoyama
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Mobile radio communication apparatus
- Patent number 5,148,181
- Issue date Sep 15, 1992
- NEC Corporation
- Yukio Yokoyama
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Shorted microstrip antenna with multiple ground planes
- Patent number 4,791,423
- Issue date Dec 13, 1988
- NEC Corporation
- Yukio Yokoyama
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Intermediate frequency amplifier with signal strength detection cir...
- Patent number 4,680,553
- Issue date Jul 14, 1987
- NEC Corporation
- Katsuji Kimura
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Combination microstrip and unipole antenna
- Patent number 4,644,361
- Issue date Feb 17, 1987
- NEC Corporation
- Yukio Yokoyama
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Portable radio communication apparatus comprising an antenna member...
- Patent number 4,641,366
- Issue date Feb 3, 1987
- NEC Corporation
- Yukio Yokoyama
- H01 - BASIC ELECTRIC ELEMENTS

Patents Applicationslast 30 patents

Information Patent Application
PIEZOELECTRIC ACOUSTIC DEVICE AND ELECTRONIC APPARATUS
- Publication number 20100246863
- Publication date Sep 30, 2010
- Yasuharu Onishi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
PIEZOELECTRIC ACTUATOR AND ELECTRONIC APPARATUS
- Publication number 20100038998
- Publication date Feb 18, 2010
- Yasuharu Onishi
- B06 - GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
Information Patent Application
CELLULAR PHONE
- Publication number 20090291721
- Publication date Nov 26, 2009
- Eiji Hankui
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Yokoyama: Yukio

Person

Patents Grantslast 30 patents

Piezoelectric acoustic device and electronic apparatus

Cellular phone

Piezoelectric actuator and electronic apparatus

Antenna for portable radio unit

Two-frequency impedance matching circuit for an antenna

Antenna for portable radio communication apparatus

Antenna for a radio communication apparatus

Portable radio with coplanar ground and atenna conductive films for...

Portable radio communication apparatus unnecessitating shielding case

Broadband radio transceiver

Mobile radio communication apparatus

Shorted microstrip antenna with multiple ground planes

Intermediate frequency amplifier with signal strength detection cir...

Combination microstrip and unipole antenna

Portable radio communication apparatus comprising an antenna member...

Patents Applicationslast 30 patents

PIEZOELECTRIC ACOUSTIC DEVICE AND ELECTRONIC APPARATUS

PIEZOELECTRIC ACTUATOR AND ELECTRONIC APPARATUS

CELLULAR PHONE