Smoking pipes
United States Patent 3417757
US Patent References:
/0402681.html
- - 0402681

Tobacco smoking pipe
- - 2192781

Tobacco pipe
- - 2431586

Smoker's appliance
- - 2510909

Smoking pipe
- - 2590488


Inventors:
Killen, Duncan C.
Ralph, Anspach
Publication Date:
12/24/1968
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Primary Class:
131/330
Other Classes:
131/198.100
International Classes:
A24F1/00
US Patent References:
2708442Smoking pipe
2709441Pre-inhalation pipe
3204642Smoking pipes
Foreign References:
GB191124226A




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