Annual Report to Shareholders
Dictaphone
| Alabama | 1925-1978 |
| Columbia | 1924-1949, 1953-1954, 1956-1964 |
| Harvard | 1924-73. |
| Purdue | 1934-1949, 1950-1951, 1952, 1967-1978. |
| MIT | 1931, 1932, 1933, 1934, 1935, 1936, 1937, 1938, 1939, 1940, 1941, 1942, 1943, 1944, 1945, 1946, 1947, 1948, 1949, 1950, 1951, |
