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All Patents in class 72/19.9
Patents 1 - 4 of 4
First set of recordsLast set of records
NumberDatePatenteeTitleType
3,464,315Sep. 02, 1969H.A. WeyerMechanical pneumatic servo control system for high-speed impact devicesdrop hammers
3,566,747Mar. 02, 1971C.W. FrameSelf-regulating expansion type control valvedrop hammers
4,653,300Mar. 31, 1987R.N. Harris, C.W. Frame, C.J. CroutAdaptive, self-regulating forging hammer control systemdrop hammers
5,715,724Feb. 10, 1998R.N. Harris, C.J. CroutAdaptive, self-regulating forging hammer control systemdrop hammers
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