U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

An automatic bed maker which uses the expansion of inflatable bladder to straighten, align, and tuck-in bed-cover assembly.

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Class 172/137 - With means to vary spacing of tools upon turning

Subclass of Class 172 - Earth working
Definition: Apparatus including means to alter the spacial relationship
No. of patents: 0