Inventor
Tetsuya Hiraji
Inventor
Kawasaki, JP
Overview
Patents· 1 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
H03Hprimary
H03HImpedance networks, e.g. resonant circuits50%
H04MTelephonic communication50%
PatentTitleYear
4,935,957'Key telephone system'1990Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1990Patents assigned to NIPPON TELEGRAPH & TELEPHONE (1)· patent assignee history
1990Patents assigned to NITSUKO LTD (1)· patent assignee history
1990Based in Kawasaki, JP· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| NIPPON TELEGRAPH & TELEPHONE | 1 | 1990 |
| NITSUKO LTD | 1 | 1990 |
Locations
| Location | Patents | Span |
|---|---|---|
| Kawasaki, JP | 1 | 1990 |