Title:
Oscillation generator for noisemaking devices
United States Patent 2521405


Inventors:
Phelps, Byron E.
Application Number:
US57906845A
Publication Date:
09/05/1950
Filing Date:
02/21/1945
Assignee:
IBM
Primary Class:
Other Classes:
327/115, 331/46, 331/48, 331/78, 340/384.3, 367/137, 434/48, 984/376
International Classes:
G10H5/00; H03B29/00
View Patent Images:
US Patent References:
2410883Frequency generating system1946-11-12
2410156Electronic timing device1946-10-29
2404047Electronic computing device1946-07-16
2354699Sound generator1944-08-01
2233258Electrical musical instrument1941-02-25
2200618Tube testing device1940-05-14
2103450Tube testing device1937-12-28
1994902Radio transmitting system1935-03-19