72133767
Dec 11, 1961
Jul 23, 1963
SELF-POWERED EARTH WORKING MACHINES INCLUDING MECHANICAL SHOVELS, BACKHOES, TRENCH DIGGING MACHINES, POST HOLE DIGGING MACHINES, AND BULLDOZERS; MOWING MACHINES; LIFT FORK TRUCKS; HIGHWAY TRAILERS FOR TRANSPORTING SUCH MACHINES; EARTH WORKING ATTACHMENTS FOR TRACTORS INCLUDING MECHANICAL SHOVEL ATTACHMENTS, BACKHOE ATTACHMENTS, TRENCH DIGGING ATTACHMENTS, POST HOLE DIGGING ATTACHMENTS, ROTARY TILLER ATTACHMENTS, AND BACK FILLING ATTACHMENTS
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