Apparatus for optically reading a record carrier by means of an

Apparatus for preventing noise generation in an electrical digit

Apparatus for pulse train measurement

Apparatus for reading a disk-shaped record carrier to be played

Apparatus for reading a record carrier on which information is r

Apparatus for reading a record carrier on which information is s

Apparatus for reading a record carrier with an optical informati

Apparatus for recording and verifying handwriting, in particular

Apparatus for signalling the position of a point on a surface

Apparatus for simultaneous generation of key at two locations

Apparatus for storing felt pens for an electronic board

Apparatus for synthesizing phase-modulated carrier wave

Apparatus for the direct connection of ancillary equipment to a

Apparatus for the identification of feedback tapes in a shift re

Apparatus for the time division multiplex transmission of binary

Apparatus for the transmission end-enciphering and reception end

Apparatus for word synchronization in an optical communication s

Architecture for communication of remote devices to a digitizing

Arrangement for aligning the image of an information structure o

Arrangement for ciphering and deciphering of information