04418277 is referenced by 94 patents and cites 1 patents.

An apparatus for use with merchandise bearing an optically readable code, including a portable wand reader which transmits a coded infrared signal to a stationary receiving/transmitting unit coupled to a data processor, which in turn emits a signal for transmission back to the wand so that it can be checked against the original signal in order to detect communication errors. A number of physically separated receiving/transmitting units may be coupled to the data processor in order to permit the wand to be used within a large region or in order to permit a number of wands to be used simultaneously.

A keyboard may be coupled to the wand for use with non-coded data, as when the price marked on the merchandise is verified.

Title
Apparatus for collecting, transmitting and processing data stored in code, preferably in bar code
Application Number
6/322716
Publication Number
4418277
Application Date
November 18, 1981
Publication Date
November 29, 1983
Inventor
Hartmut Bernot
Schmeilweg 3, 6900 Heidelberg, Staatsange
DE
Hartmut Tremmel
In der Kappisau 4, 6921 Sinsheim, Staatsange
DE
Agent
Staas & Halsey
IPC
G06K 7/10
View Original Source