1899
1948
1956
1958
1959
1961
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1975
1977
1979
1980
1982
1983
1984
1985
1986
1987
1988
1990
1991
1992
1993
1994
1995
1996
2010
2012
2013
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
Tot
+++ 1963.a. Philips EL3300 - world's first "compact-cassette"recorder - the classic starting point of "cassette" era
+++ 1962-3.f. Revere M-2 - world's first çontinuous play" cartridge recorder
+++ 1955.a. Mohawk Midgetape BR-1 - world's 1st pocket cass. recorder
+++ 1988.k.c. Pocket Rockers - smallest endless cassette 
+++ 1988.k. Pocket Rockers - smallest portable endless cassette player
+++ 1980.l.c. Philips LDB 4401 - world's first digital minicassette
+++ 1971.e. Pioneer M-7S Hipac
+++ 1956 ?.c. Cousino MR-9000 ''Sales maker''
+++ 1964.e.c. 3M/Scotch Cantata 700 = greatest audio cassette
+++ 1964.d. OrrTronic P-600 AutoMate = first (?) car cartridge player made/used in USA
+++ 1982.e. Olympus L400 - smallest (micro)cassette recorder ever
+ 1972.j. National Panasonic SG-106F
1951.b. Loewe Optaphon 51 WAP
+++ 1962-3.f.c. 3M(Scotch) type 270
+++ 1965.a. Grundig C100 - first DC cassette recorder