USPC 114/67R
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U.S. Patent Classification (USPC) class 114/67R covers anti-friction surfaces for ships. These provide "means for diminishing the resistance between the water and the vessel when moving through the water and effective in increasing the speed. The present types comprise friction-roller surfaces, conveyers, and air-distributing means or attachments to produce a better cutting edge."[1][2]
References
- Patents in this category
- Patent US-1893-506969 (National tech categories: USPC 244/30 • USPC 114/67R • USPC 244/96, Inventors: Axel F. Bergquist)
- Patent US-1905-785717 (National tech categories: USPC 244/45R • USPC 114/67R, Inventors: Alexander P. Criswell)
- Patent US-1905-831173 (National tech categories: USPC 244/16 • USPC 114/67R • USPC 244/90R, Inventors: John J. Montgomery)
- Patent US-1912-1065506 (National tech categories: USPC 244/130 • USPC 114/67R • USPC 188/270, Inventors: Louis Constantin)
- Patent US-1914-1104254 (National tech categories: USPC 244/130 • USPC 114/243 • USPC 114/67R, Inventors: Gustav R. Eddelbuttel-Reimers)
| Enclosing categories | USPC 114 |
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| Keywords | Aerial traction, Covering |
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