Secure keyboard with random order of key interrogation
Secure keypad scanning
Security keyboard matrix scanning method
Security system transmitter with opposed concave actuators
Segmented gain controller
Self-powered switching device
Self-scan programmable keypad interface
Sensing keys for keyboard
Sequential two-key system to input keyboard characters and...
Shared interface device
Single wire keyboard encode and decode circuit
Single-hand input keyboard
Single-hand mounted and operated keyboard
Smart multiple switch scanner, single wire bus multiplex system
Snap-on keyboard and method of integrating keyboard
Soft cover adapter for computer keyboard
Solid state capacitive switch
Spill-resistant keyboard
Split keyboard adjustment system
Stacked computer keyboard function key multiple template retaine