Inventor
Tatsuo Baba
Inventor
Toyokawa, JP
Overview
Patents· 5 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
H03Fprimary
H03FAmplifiers22%
G11BInformation storage based on relative movement between record carrier and transducer11%
H02HEmergency protective circuit arrangements11%
H04RLoudspeakers, microphones, gramophone pick-ups or like acoustic electromechanical transducers11%
H10BElectronic memory devices11%
H10DInorganic electric semiconductor devices11%
H10WGeneric packages, interconnections, connectors or other constructional details of devices covered by class h1011%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests11%
PatentTitleYear
4,630,237'Read-only memory and method of manufacturing the same'19864,580,255'Servo circuit for a signal reproducing apparatus'19864,163,119'Protective circuit for electroacoustic transducer with hall element and voice coil temperature rise time constant circuit'19794,151,479'Low frequency power amplifier using MOS FET\'s'19794,100,501'Audio frequency power amplifier'1978Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1978–1986Patents assigned to HITACHI LTD (4)· patent assignee history
1978–1979Based in Toyokawa, JP· patent location history
1986Patents assigned to NIPPON TELEGRAPH & TELEPHONE (1)· patent assignee history
1986Based in Yokohama, JP· patent location history
1986Based in Aichi, JP· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| HITACHI LTD | 4 | 1978–1986 |
| NIPPON TELEGRAPH & TELEPHONE | 1 | 1986 |
Locations
| Location | Patents | Span |
|---|---|---|
| Toyokawa, JP | 3 | 1978–1979 |
| Yokohama, JP | 1 | 1986 |
| Aichi, JP | 1 | 1986 |