+++ 1951 c.c. Loewe Optaphon - world's first cassette with magnetic tape 
+++ 1955.a. Mohawk Midgetape BR-1
1951.c. Loewe Optaphon 51 WAP
+++ 1947.a. RCA MI-12875 - first domestic cartridge recorder
+++ 1951(?).a.c. caseta/cartridge Peirce 330
+++ 1951.b. first endless cassette - caseta/cassette Tefi Schallband
+++ 1951(?).a. Peirce 265B - wire cartridge recorder