Step tool
United States Patent 3373458
US Patent References:
/0398781.html
- - 0398781

/0515890.html
- - 0515890

Trowel
- - 1370060

Corner-trowel
- - 1383688

Trowel
- - 2178899


Inventors:
Haivala, William S.
Publication Date:
03/19/1968
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Assignee:
HAIVALA CONCRETE TOOLS INC
Primary Class:
15/235.700
Other Classes:
15/235.800
International Classes:
E04G13/06; E04G13/00
US Patent References:
2595742Corner trowel
2701465Plasterer's trowel and the like
3241174Corner trowel