The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 04, 2019
Filed:
Apr. 25, 2018
Bo-an Chen, Taipei, TW;
Chin-sung Pan, Taipei, TW;
Bo-An Chen, Taipei, TW;
Chin-Sung Pan, Taipei, TW;
PRIMAX ELECTRONICS LTD, Taipei, TW;
Abstract
A keyboard device includes plural keys, a supporting plate and a membrane switch circuit member. The membrane switch circuit member includes a first board, a second board, a third board and a fourth board. The first board includes plural first contacts. The second board includes plural second contacts and plural first openings. The third board includes plural third contacts and plural second openings. The fourth board includes plural fourth contacts. The plural first contacts, the plural first openings and the plural third contacts are collaboratively defined as a first key matrix. The plural second contacts, the plural second openings and the plural fourth contacts are collaboratively defined as a second key matrix.