US PATENT SUBCLASS 37 / 201
.~.~ Explosive
Current as of:
June, 1999
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37 /
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EXCAVATING
196
DF
SNOW OR ICE REMOVING OR GROOMING BY PORTABLE DEVICE
{16}
198
DF
.~ Railway clearer {7}
201
.~.~ Explosive
DEFINITION
Classification: 37/201
Explosive:
(under subclass 198) Apparatus including means for blasting through snow or ice with an explosive.