Title:
Magnetic toy building blocks
United States Patent 2939243
US Patent References:
Magnetic coupler
- - 2226287

Coupling for toy trains
- - 2500180

Magnetic toy blocks
- - 2570625

Magnetic toy blocks
- - 2795893


Inventors:
Duggar, Robert G.
Publication Date:
06/07/1960
View Patent Images:
Download PDF 2939243 pdf       PDF help
Export Citation:
Click for automatic bibliography generation
Assignee:
Duggar, Robert G.
Primary Class:
446/92
Other Classes:
273/157R
International Classes:
A63H33/04