Circuit board

Details Circuit board Circuit board

1986-03-12

1987-06-30

Kucia, R. R.

Electricity: electrical systems and devices

Miscellaneous

338115, 338184, 361398, H05K 0118

Patent

active

046775293

ABSTRACT:
A circuit board for use in a keyboard has a lower insulating sheet, an insulating sheet, and an upper insulating sheet stacked on top of each other. Switch circuit patterns are formed on the upper and lower insulating sheets so as to be opposed to each other. Circuit patterns acting as electrical parts such as rheostats are formed on the insulating spacer.

REFERENCES:
patent: 3657494 (1972-04-01), Gargini
patent: 4105987 (1978-08-01), Spence et al.
patent: 4206334 (1980-06-01), LaRock
patent: 4359277 (1982-11-01), Shimizu et al.
patent: 4453152 (1984-06-01), Dob et al.
patent: 4495524 (1985-01-01), Kakuhashi et al.
patent: 4532575 (1985-07-01), Suwa

Affiliated with

Also associated with

Rating

Circuit board does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Circuit board, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Circuit board will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-451355