1
James B Mallos: Touch position sensitive surface. Bell Telephone Laboratories Incorporated, David H Tannenbaum, August 24, 1982: US04346376 (122 worldwide citation)

A touch sensitive device is arranged with substantially parallel surfaces inside which light from a synchronized source, such as a CRT, can become trapped by total internal reflection. The edges of the device are fitted with photodetectors which respond to the entrapment of light within the surfaces ...


2
John DeCosta, James B Mallos, David B Roe: Dynamic position locating system. Bell Telephone Laboratories Incorporated, H L Newman, July 20, 1982: US04340777 (38 worldwide citation)

A position locating system for calculating the coordinates of a localized force applied to a surface (101a) has force sensing devices (101, 501, or 501a) for supporting the surface (101a). The force sensing devices provide force proportional electrical signals to a processing system (512) for calcul ...


3
John DeCosta, James B Mallos, David B Roe: Mounting arrangement for a position locating system. Bell Telephone Laboratories Incorporated, H L Newman, October 19, 1982: US04355202 (28 worldwide citation)

Mechanical coupling apparatus for a position locating system comprises a force sensing device (504). One extremity of the coupling apparatus is joined to a rigid body (506) which may be fixed. A plate or a visual display screen (501) having a surface (501a or 501b) exposed to the application of a lo ...