Title:
Electrical recorder reproducer
United States Patent 1776045
Inventors:
Rogers, Harrison W.
Publication Date:
09/16/1930
Export Citation:
Click for automatic bibliography generation
Assignee:
Rogers, Harrison W.
Primary Class:
369/148
Other Classes:
369/251
International Classes:
H04R11/08; H04R11/00
View Patent Images:
Download PDF 1776045        PDF help