Title:
Sound reproducer
United States Patent 1834498

Inventors:
Parshall, Harry R.
Publication Date:
12/01/1931
View Patent Images:
Download PDF 1834498 pdf       PDF help
Export Citation:
Click for automatic bibliography generation
Assignee:
Parshall, Harry R.
Primary Class:
381/190
Other Classes:
367/175, 367/168, 310/26, 318/118
International Classes:
H04R15/00