Title:
Recording device
United States Patent 1351071


Inventors:
Alexander, Silverman
Johnson, Roswell H.
Application Number:
US23879718A
Publication Date:
08/31/1920
Filing Date:
06/07/1918
Assignee:
Alexander, Silverman
Johnson, Roswell H.
Primary Class:
Other Classes:
346/11, 346/135.1, 347/163, 347/171, 428/913, 503/211, 503/212, 503/225
International Classes:
B41M5/28; G01D15/10
View Patent Images: