Inventor
ALBERTSON PHILIP E
US3 patents
Patents
3 patentsUS4963075AOct 16, 1990
Radial diaphragm pump
CHARLES MACHINE WORKS39 citations90
US4475604AOct 9, 1984
Mobile machine for subterranean installation of piping and the like
CHARLES MACHINE WORKS38 citations90
US4981396AJan 1, 1991
Multiple pipe installation backfilling, and compaction attachment
CHARLES MACHINE WORKS50 citations87