US PATENT SUBCLASS 256 / 12.5
DRIFTAGE CONTROL
Current as of: June, 1999
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DEFINITION
Classification: 256/12.5
(under the class definition) Barriers designed to regulate wind and air currents so that driftage of snow or sand will be controlled.
(1) Note. These barriers usually act either (1) to so direct wind or air currents to cause the same to pick up and remove snow or sand from places it is desired to keep clear thereof, or (2) to cause wind or air currents to drop sand or snow carried thereby to avoid the same accumulating at places it is desired to keep clear, thereof, for example, railways or roadways.
SEE OR SEARCH CLASS
104, Railways,
279+, for miscellaneous railway track clearing or cleaning means.
135, Tent, Canopy, Umbrella, or Cane,
87+, for portable shelters used as a snow or wind screen.
