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+++ 1951 c.c. Loewe Optaphon - world's first cassette with magnetic tape 
Lodewijk/Lou F. Ottens - compact-cassette project coordinator 
dr. Karl Daniel - inventator si promotorul casetei fara sfarsit/endless cassette inventor & promoter
+ 1964.f.c Norelco compact-cassette -first model
William Powell Lear - 8-track cartridge inventor
+++ 1987 .d. caseta/cassette DAT = Digital Audio Tape
+++ 1974(?).g. caseta/cassette Memocord MC990 Ind-X-Matic - single cassette w. built-in counter 
+++ 1958.a.c.- caseta/cassette pt/for Saba TKR15 radiorecorder
++ 1971(?).f. Norelco 3170 - first Philips (USA) stereo portable radiorecorder 
++ 1970.n. Sony CF-100 - first Sony radiorecorder
++ 1956-9 Arvin Industries - Morse signal coder + decoder 
+++ 1970.m. Sanyo Cartridge Corder
++ 1948-50.a. Peirce Sound recorder RD-106/ANH-2
+++ 1963 a.c. Philips EL 1903 - first compact-cassette(TM) model
Valdemar Poulsen - magnetic wire recording' inventor