Tadashi Sawafuji

Follow

Person

Toshima-ku, Tokyo, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Piezoelectric transducer
- Patent number 4,597,099
- Issue date Jun 24, 1986
- Tadashi Sawafuji
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Plane speaker
- Patent number 4,544,805
- Issue date Oct 1, 1985
- Tadashi Sawafuji
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Speaker or microphone having corrugated diaphragm with conductors t...
- Patent number 4,276,449
- Issue date Jun 30, 1981
- Tadashi Sawafuji
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Electromagnetic type acoustic transducers
- Patent number 4,228,327
- Issue date Oct 14, 1980
- Tadashi Sawafuji
- H04 - ELECTRIC COMMUNICATION TECHNIQUE