US PATENT SUBCLASS 112 / 237
.~.~ Lifting
Current as of:
June, 1999
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112 /
HD
SEWING
270
DF
ELEMENTS
{21}
235
DF
.~ Presser devices {3}
237
.~.~ Lifting {2}
238
DF
.~.~.~
> With tension release
239
DF
.~.~.~
> Automatic
DEFINITION
Classification: 112/237
Operable to release work.
