USPC 440/33

USPC 440/33 was a classification for patents about towing -- usually in a marine context but sometimes in an aero context.

Category tree:

• Class 440, Marine propulsion
  • USPC 440/33 Towing - Device wherein the propulsion means is a means provided to haul or pull a vessel in a canal or river or upon the sea or other bodies of water
    • USPC 440/34 Cable system: Device wherein the propulsion means includes the use of a strong strandlike member or a strandlike member is engaged by a device on the vessel to pull the vessel through the water. The strandlike member may be either fixed or movable. If movable, the vessel is provided with means for securing the cable thereto, and if fixed, the vessel has traction means for hauling the cable in and paying it out.
    • USPC 440/35 Track system: Device wherein the propulsion means comprises tracks upon which a traction device or vessel runs.
    • USPC 440/36 Ground wheel or poler: Device wherein the propulsion means comprises traction wheels which are used to traverse the bed or bottom of the canal or a long cylindrical piece of wood or metal attached to the vessel contacts or digs into the bed or bottom of the canal.

References

This wiki has 1 patents in category "USPC 440/33".

Patents in category USPC 440/33

• Patent US-1889-417755 (English title: Aerial apparatus, Inventors: David Thayer, Filing date: 1889-07-22)

Enclosing categories	USPC 440
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