- ++ 1956-9 Arvin Industries - Morse signal coder + decoder
- +++ 1959.c. Minifon Attache = 1st european pocket cassette recorder
- +++ 1958.a. RCA Victor CP-1
- +++ 1958.a. Saba TKR-15 Sabamobil = world's 1-st portable radio-cassette player
- +++ 1956.a. Tefifon KC-1
- +++ 1956 ?.c. Cousino MR-9000 ''Sales maker''
- ++ 1959.c. Mohawk Midgetape 300 = world's 1-st transistorized variant of 1-st pocket cartridge recorder
- + 1959.b. ITC Omega = Fidelipac deck broadcast recorder
- ++ 1960.a. RCA Victor 1YC-11
- +++ 1958.a.c. caseta RCA Sound Tape Cartridge - 4-piste/tracks
- +++ 1959.c.c. caseta/cassette Minifon
- +++ 1957.a. Dictaphone Dictet MPA = world's 1st transistorised pocket tape recorder
- +++ 1957.a.c. caseta/cassette Dictaphone Dictet - the 3-rd world's tape cassette; a 3-a caseta cu banda magnetica