Keiko Kitagawa

Follow

Person

Tokyo, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Auditory playing device
- Patent number 5,334,022
- Issue date Aug 2, 1994
- Sony Corporation
- Keiko Kitagawa
- G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
Information Patent Grant
Broadcast satellite receiver
- Patent number 4,903,130
- Issue date Feb 20, 1990
- Sony Corporation
- Keiko Kitagawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE