Communication apparatus
Communication receiving apparatus
Communication system
Communications system input-output converter
Communications systems having a selective facsimile output
Compact flatbed page scanner
Compact keyboard with entry of keyed and graphic information
Compact unit for optical security system
Compatible picturephone system
Compensation of stylus signals in digitizing tablet
Complete substitution permutation enciphering and deciphering ci
Composite page setter
Computer accessing system
Computer input device
Computer interface device
Computer security system for a time shared computer accessed ove
Computer systems to inhibit unauthorized copying, unauthorized u
Computer telephone access security processor
Conditional replenishment video encoder with sample grouping and
Conductive electrode arrays and arrays of resistive elements for