Title:
Educational appliance
Document Type and Number:
United States Patent 1470845
Inventors:
Hilding, Johnson Johan
Plaque It!
Sponsored by: Flash of Genius |
Publication Date:
10/16/1923
View Patent Images:
Images are available in PDF form when logged in. To view PDFs, Login or
Create Account (Free!)
Referenced by:
Export Citation:
Assignee:
Hilding, Johnson Johan
Primary Class:
Other Classes:
273/143R
International Classes:
G09B1/20; G09B1/00