
Binocular research microscope
1945-1960
1945-1960
24 June 1950
24 June 1950
1900-1979
1965-1967
1986
1984
(1969); 2013
1959
1880
1965-1967
2000-09-12
2000-08-24
1965-1967
1965-1967
1966
1965-1967
1965-1967
1966
1965-1967
1969
1966
1930-1940
1930-1940
1930-1940
1950-1979
1900-1979
1900-1979
1900-1979
1900-1979
1900-1979
1929
1985
1901
1899
1876-1978
1910
1897
patented 1908
1966
1965-1967
1966
1967
1965-1967
1965-1967
1966