Koichi Tsunekawa

Person

Kanagawa, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Antenna device having two resonance frequencies
- Patent number 5,917,450
- Issue date Jun 29, 1999
- NTT Mobile Communications Network Inc.
- Koichi Tsunekawa
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Broadband antenna using a semicircular radiator
- Patent number 5,872,546
- Issue date Feb 16, 1999
- NTT Mobile Communications Network Inc.
- Taisuke Ihara
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Microstrip antenna device
- Patent number 5,767,810
- Issue date Jun 16, 1998
- NTT Mobile Communications Network Inc.
- Seiji Hagiwara
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Antenna device having a band pass filter
- Patent number 5,684,492
- Issue date Nov 4, 1997
- Mitsubishi Denki Kabushiki Kaisha
- Kenichi Kagoshima
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Antenna equipment
- Patent number 5,617,105
- Issue date Apr 1, 1997
- NTT Mobile Communications Network, Inc.
- Koichi Tsunekawa
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Antenna devices having double-resonance characteristics
- Patent number 5,568,155
- Issue date Oct 22, 1996
- NTT Mobile Communications Network Incorporation
- Koichi Tsunekawa
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Inverted F antenna with non-contact feeding
- Patent number 5,434,579
- Issue date Jul 18, 1995
- Mitsubishi Denki Kabushiki Kaisha
- Kenichi Kagoshima
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Portable radio unit having strip antenna with parallel twin-lead fe...
- Patent number 5,412,392
- Issue date May 2, 1995
- NTT Mobile Communications Network, Inc.
- Koichi Tsunekawa
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Retractable antenna system
- Patent number 5,374,937
- Issue date Dec 20, 1994
- Nippon Telegraph & Telephone Corporation
- Koichi Tsunekawa
- H01 - BASIC ELECTRIC ELEMENTS

Koichi Tsunekawa

Person

Patents Grantslast 30 patents

Antenna device having two resonance frequencies

Broadband antenna using a semicircular radiator

Microstrip antenna device

Antenna device having a band pass filter

Antenna equipment

Antenna devices having double-resonance characteristics

Inverted F antenna with non-contact feeding

Portable radio unit having strip antenna with parallel twin-lead fe...

Retractable antenna system