US PATENT SUBCLASS 33 / 199 B
.~.~ Bench type
Current as of: June, 1999
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Unofficial Alpha Subclasses: R B
DEFINITION
Classification: 33/199
(under subclass 501) Devices designed to determine characteristics of screw thread structure.
SEE OR SEARCH THIS CLASS, SUBCLASS:
143+, for special contact members used with "opposed contact" instruments for taking the diameter of the threaded bar.
501.7+, for gauges having means to determine the lead angle or spur gearing.