Title:
Checker brick
United States Patent 1907170

Inventors:
Hearn, Charles A. J.
Publication Date:
05/02/1933
View Patent Images:
Download PDF 1907170 pdf       PDF help
Export Citation:
Click for automatic bibliography generation
Assignee:
Hearn, Charles A. J.
Primary Class:
165/9.100
Other Classes:
52/606, 165/DIG.021
International Classes:
F28F21/04; F28F21/00