Akiho Doi

Follow

Person

Tokyo, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Synchronization system for key telephone system
- Patent number 4,502,138
- Issue date Feb 26, 1985
- Iwasaki Tsushinki Kabushiki Kaisha
- Akiho Doi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Reception system for key telephone system
- Patent number 4,490,820
- Issue date Dec 25, 1984
- Iwasaki Tsushinki Kabushiki Kaisha
- Akiho Doi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE