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- [2] Portable facsimile transmitter ZEITSCHRIFT DES VEREINES DEUTSCHER INGENIEURE, 1937, 81 : 861 - 861
- [5] A PORTABLE ELECTROCARDIO TRANSMITTER AND RECEIVER ELECTRONIC ENGINEERING, 1965, 37 (454): : 806 - &
- [6] Portable rangefinder laser transmitter ADVANCED TOPICS IN OPTOELECTRONICS, MICROELECTRONICS, AND NANOTECHNOLOGIES, 2002, 5227 : 443 - 446
- [9] TS 1085 - A PORTABLE WIREPHOTO TRANSMITTER. Telcom Report (English Edition), 1980, 3 (04): : 271 - 274