US3155328A - Combined trench hoe and crusher ball machine ...
LESTER A. LONGLEY A TTORNE Y United States Patent 3,155,328 COMBENED TRENCH HOE AND CRUSHER BALL MACHINE 'Lester A. Langley, Las Vegas, Nev., assignor to Langley This invention relates to improvements in excavating machines of the so-called trench hoe type.