Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Reexamination Certificate
2005-12-13
2005-12-13
Porta, David (Department: 2878)
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
C345S166000
Reexamination Certificate
active
06974947
ABSTRACT:
An apparatus for sensing rotation includes a plurality of motion sensors constructed in a substantially coplanar arrangement. The plurality of motion sensors is each configured to generate incremental movement data indicative of movement of the sensor in two dimensions. A rotation data generator generates rotation data based on the incremental movement data. The rotation data represents rotation of a first one of the motion sensors about a second one of the motion sensors.
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Black Robert A.
Brosnan Michael J.
Grewal Roopinder Singh
Lee Patrick J.
Porta David
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