(under subclass 37) Subject matter, for the testing of the operating or control mechanism of fluid pressure operated brakes (e.g., air or hydraulic types for motor vehicles, trains, etc.).
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7, for testing the wear surfaces of brakes by abrasion, milling, rubbing or scuffing.
121+, for other types of brake testing.
862.09+, particularly subclasses 862.09+ for dynamo-meters having brakes.
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188, Brakes, particularly 141, and 151+ for fluid pressure types.
