Inventor
Nobuo Tsukada
Inventor
Tokyo, JP
Overview
Patents· 13 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
G04Cprimary
G04CElectromechanical clocks or watches18%
H02NElectric machines not otherwise provided for18%
Y10TTechnical subjects covered by former us classification14%
G04BMechanically-driven clocks or watches9%
G04GElectronic time-pieces9%
H02KDynamo-electric machines9%
B26DCutting5%
G01DMeasuring not specially adapted for a specific variable5%
H03HImpedance networks, e.g. resonant circuits5%
H10NElectric solid-state devices not otherwise provided for5%
PatentTitleYear
5,254,899'Micro-traveller with ultrasonic motor'19935,079,470'Standing-wave type ultrasonic motor and timepiece'19925,056,201'Method of making a travelling-wave motor'19915,043,956'Wristwatch with oscillation alarm'19915,025,186'Ultrasonic motor'19915,023,853'Electric apparatus with silent alarm'19914,721,058'Paper cutting unit of automatic drawing machines'19884,645,356'Wristwatch'19874,447,163'Stem mechanism for a watch'19844,114,365'Battery lead plate member for an electronic wrist watch'19784,102,123'Bearing for a timepiece train'19784,023,055'Mounting device for a quartz tuning fork'19774,012,899'Micro motor for a timepiece'1977Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1977–1988Patents assigned to SEIKO INSTR & ELECTRONICS (7)· patent assignee history
1977–1993Based in Tokyo, JP· patent location history
1991–1993Patents assigned to SEIKO INSTR INC (5)· patent assignee history
1991Patents assigned to KAWATA MASAYUKI (1)· patent assignee history
1991Patents assigned to TSUKADA NOBUO (1)· patent assignee history
1991Based in 31-1, Kameido 6-chome, Koto-Ku Tokyo, JP· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| SEIKO INSTR & ELECTRONICS | 7 | 1977–1988 |
| SEIKO INSTR INC | 5 | 1991–1993 |
| KAWATA MASAYUKI | 1 | 1991 |
| TSUKADA NOBUOself | 1 | 1991 |
Locations
| Location | Patents | Span |
|---|---|---|
| Tokyo, JP | 12 | 1977–1993 |
| 31-1, Kameido 6-chome, Koto-Ku Tokyo, JP | 1 | 1991 |