Inventor
Seishi Kitayama
Inventor
Tokyo, JP
Overview
Patents· 8 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
H04Bprimary
H04BTransmission50%
G10LSpeech analysis techniques or speech synthesis30%
H04JMultiplex communication10%
H04MTelephonic communication10%
PatentTitleYear
4,633,046'Adaptive echo canceller'19864,610,022'Voice encoding and decoding device'19864,516,259'Speech analysis-synthesis system'19854,479,036'Echo control system'19844,282,406'Adaptive pitch detection system for voice signal'19814,232,400'Echo control system'19804,126,770'Echo canceller'19784,064,378'Echo cancelling system for multiplex telephone circuits'1977Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1977–1986Patents assigned to KOKUSAI DENSHIN DENWA CO LTD (8)· patent assignee history
1977–1986Based in Tokyo, JP· patent location history
1986Patents assigned to NEC CORP (1)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| KOKUSAI DENSHIN DENWA CO LTD | 8 | 1977–1986 |
| NEC CORP | 1 | 1986 |
Locations
| Location | Patents | Span |
|---|---|---|
| Tokyo, JP | 8 | 1977–1986 |