Nesseth Clifford A: Manure storage pit pump. Mentag Robert G, October 28, 1975: US3915594 (59 worldwide citation)

A manure storage pit pump for attachment to a tractor having a power output shaft and a hitch means for loading manure into a liquid manure transfer tank mounted on a vehicle such as a spreader vehicle or a truck, or for agitating manure in a storage pit. The pump includes a support frame for detach ...

Nesseth Clifford A: Detachable flexible track for tractor wheels and the like. Mentag Robert G, April 8, 1975: US3875987 (3 worldwide citation)

A detachable, flexible track for attachment to the outer periphery of a vehicle wheel tire to enable a vehicle which is stalled in snow or mud to obtain traction and drive out of the stalled position. The flexible track includes a plurality of track tread members for mounting in an operative, transv ...