Iwatsu Electric Co., Ltd.

Organization

Tokyo, JA

Organizations

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Patents Grantslast 30 patents

Information Patent Grant
Electrophotographic liquid developer containing a graft copolymer o...
- Patent number 4,085,058
- Issue date Apr 18, 1978
- Iwatsu Electric Co., Ltd.
- Syozo Adachi
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Multi-frequency signal receivers
- Patent number 4,085,295
- Issue date Apr 18, 1978
- Iwatsu Electric Co., Ltd.
- Tadahiro Goto
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Etching processing apparatus
- Patent number 4,073,028
- Issue date Feb 14, 1978
- Iwatsu Electric Co., Ltd.
- Akira Kakito
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Grant
Non-impact printing system with magnetic recording apparatus and me...
- Patent number 4,072,957
- Issue date Feb 7, 1978
- Iwatsu Electric Company, Ltd.
- Norio Kokaji
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Electrophotographic copying apparatus having a dual cam synchronizi...
- Patent number 4,025,178
- Issue date May 24, 1977
- Iwatsu Electric Co., Ltd.
- Michiaki Yokozawa
- B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
Information Patent Grant
Key telephone system
- Patent number 4,024,353
- Issue date May 17, 1977
- Iwatsu Electric Co., Ltd.
- Tokuhisa Hijikata
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Display apparatus
- Patent number 4,011,546
- Issue date Mar 8, 1977
- Iwatsu Electric Co., Ltd.
- Yoshihiro Kawata
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Call circuit for key telephone system for giving direct station sel...
- Patent number 4,011,415
- Issue date Mar 8, 1977
- Iwatsu Electric Co., Ltd.
- Hikaru Takematsu
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Automatic telephone answering and recording device
- Patent number 4,011,411
- Issue date Mar 8, 1977
- Iwatsu Electric Co., Ltd.
- Yuichi Nishimura
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Multifrequency signal receiver for use in telephone signaling syste...
- Patent number 4,004,105
- Issue date Jan 18, 1977
- Iwatsu Electric Co., Ltd.
- Shigeyuki Mizukoshi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Carrier for processing semiconductor materials
- Patent number 3,998,333
- Issue date Dec 21, 1976
- Iwatsu Electric Co., Ltd.
- Hiroshi Kamada
- C30 - CRYSTAL GROWTH
Information Patent Grant
Charge storage tube and method for operating the same
- Patent number 3,982,191
- Issue date Sep 21, 1976
- Iwatsu Electric Co., Ltd.
- Hajime Takita
- G11 - INFORMATION STORAGE
Information Patent Grant
Communication systems of key telephone systems
- Patent number 3,979,563
- Issue date Sep 7, 1976
- Iwatsu Electric Co., Ltd.
- Gunzo Kita
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Visual indicating control circuit in key telephone system
- Patent number 3,971,898
- Issue date Jul 27, 1976
- Iwatsu Electric Co., Ltd.
- Tokuhisa Hijikata
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Compensating circuit for a cold junction of a thermocouple
- Patent number 3,956,686
- Issue date May 11, 1976
- Iwatsu Electric Co., Ltd.
- Katsuaki Tanaka
- G01 - MEASURING TESTING
Information Patent Grant
Frequency conversion system
- Patent number 3,943,460
- Issue date Mar 9, 1976
- Iwatsu Electric Co., Ltd.
- Minoru Arai
- H03 - BASIC ELECTRONIC CIRCUITRY

Iwatsu Electric Co., Ltd.

Organization

Patents Grantslast 30 patents

Electrophotographic liquid developer containing a graft copolymer o...

Multi-frequency signal receivers

Etching processing apparatus

Non-impact printing system with magnetic recording apparatus and me...

Electrophotographic copying apparatus having a dual cam synchronizi...

Key telephone system

Display apparatus

Call circuit for key telephone system for giving direct station sel...

Automatic telephone answering and recording device

Multifrequency signal receiver for use in telephone signaling syste...

Carrier for processing semiconductor materials

Charge storage tube and method for operating the same

Communication systems of key telephone systems

Visual indicating control circuit in key telephone system

Compensating circuit for a cold junction of a thermocouple

Frequency conversion system