Keyboard

Details Keyboard Keyboard

1998-07-10

1999-10-19

Le, Thien M.

Registers

Systems controlled by data bearing records

Credit or identification card systems

235375, 200 5A, 200 5B, 3404071, 3404072, G06K 500

Patent

active

059693207

ABSTRACT:
A keyboard includes a keyboard membrane where the membrane comprises a top layer, a spacer layer and a bottom layer. The spacer layer has interconnecting voids that are connected to the atmosphere by a common vent. A patch made of a hydrophobic material prevents water entering the keyboard membrane via the vent, but allows the air pressure inside the voids to remain balanced with the atmospheric air pressure.

REFERENCES:
patent: 3657492 (1972-04-01), Arndt et al.
patent: 3860771 (1975-01-01), Lynn et al.
patent: 4017697 (1977-04-01), Larson
patent: 4046975 (1977-09-01), Seeger, Jr.
patent: 4352968 (1982-10-01), Pounds
patent: 4391845 (1983-07-01), Denley
patent: 4396830 (1983-08-01), Isozaki et al.
patent: 4421958 (1983-12-01), Kameda
patent: 4421966 (1983-12-01), Pounds
patent: 4456798 (1984-06-01), Iwai et al.
patent: 4490587 (1984-12-01), Miller et al.
patent: 4501936 (1985-02-01), Morse
patent: 4919563 (1990-04-01), Stice
patent: 5132496 (1992-07-01), Lee
patent: 5218177 (1993-06-01), Coleman, III et al.
patent: 5481464 (1996-01-01), Ramsden

Affiliated with

Also associated with

Rating

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

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2058642