US PATENT SUBCLASS 33 / 451
.~ Combined with level
Current as of: June, 1999
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DEFINITION
Classification: 33/451
Combined with level:
(under subclass 403) Subject matter having means to assist in the alignment of the straightedge with respect to the direction of the force of gravity comprising gravity indicating means.
(1) Note. Level of plumb structure per se can be found in other sections of this class under subclasses 300+, "Indicator of Direction of Force Traversing Natural Media". The primary difference is that the intended function of the device is that of indicating direction rather than it being utilized as a straightedge device.
SEE OR SEARCH THIS CLASS, SUBCLASS:
365+, for levels including those similar to those found in this subclass, although a straightedge-type device may be disclosed.
