U.S. federal trademark · Serial No. 72323346 · Reg. No. 0910361
PORTABLE PUSHBUTTON APPARATUS FOR THE GENERATION OF MULTI-FREQUENCY TONES FOR TRANSMISSION OF DATA OVER TELEPHONE LINES, THE TONES BEING CONVERTED INTO INTELLIGIBLE SIGNALS AT A REMOTE POINT TO ACTUATE A DATA-PROCESSING DEVICE
Source: USPTO federal trademark records. Informational only, not legal advice. Status and details may lag the live USPTO database.