Inventor
Sadao Tachibana
Inventor
Tokyo, JP
Overview
Patents· 6 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
H01Hprimary
H01HElectric switches75%
H05KPrinted circuits13%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests13%
PatentTitleYear
5,914,468'Keyboard unit and key switch'19995,256,843'Keyboard switch and method of manufacturing the same'19934,927,990'Spring-biased push-button switch having a spring-loaded tactile feedback feature'19904,874,913'Luminous element holding structure for an illuminated key switch'19894,851,618'Keyboard'19894,837,412'Keyboard of a membrane contact type'1989Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1989–1999Patents assigned to OKI ELECTRIC IND CO LTD (6)· patent assignee history
1989–1999Based in Tokyo, JP· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| OKI ELECTRIC IND CO LTD | 6 | 1989–1999 |
Locations
| Location | Patents | Span |
|---|---|---|
| Tokyo, JP | 6 | 1989–1999 |