1
Paul McAvinney: Method and apparatus for isolating and manipulating graphic objects on computer video monitor. Sensor Frame Incorporated, Arnold B Silverman, May 24, 1988: US04746770 (305 worldwide citation)

A method of selection and/or manipulating graphic objects such as may appear on a computer video monitor is provided as is associated apparatus. A frame member cooperates with a plurality of optical sensors and a plurality of light occluding objects which tend to obstruct a portion of the light norm ...


2
Paul McAvinney, Dean H Rubine: VideoHarp. Sensor Frame Corporation, Reed Smith Shaw & McClay, November 6, 1990: US04968877 (204 worldwide citation)

The VideoHarp is an optical-scanning device for sensing and tracking the movement of multiple fingers which is then used to control the generation of light or sound or to control the motion of other physical objects. Preferably, the VideoHarp detects the images of a performer's fingertips using a si ...