Duplex mud pump

The ornamental design for a duplex mud pump, as shown.

FIG. 1 is a front perspective view of a duplex mud pump showing my new design;

FIG. 2 is a front elevational view thereof, with certain parts omitted for ease of illustration;

FIG. 3 is a rear perspective thereof;

FIG. 4 is a bottom plan view thereof with certain parts omitted for ease of illustration; and

FIG. 5 is a right side elevational view thereof with certain parts omitted for ease of illustration.

Patent	Priority	Assignee	Title
D292215,	May 14 1984	FLUIDS CONTROL, INC , 109 PARKVIEW ROAD, P O DRAWER 2250, EVANSTON, WYOMING 82930 A COMPANY COLORADO	Fluid filtration unit for use in oil well hole drilling operations
D807925,	Jun 02 2016	ATLAS COPCO AIRPOWER N V	Compressor

Executed on	Assignor	Assignee	Conveyance	Frame	Reel	Doc
May 06 1982	KUCHAR, WALTER	TRI-SERVICE MACHINE LTD	ASSIGNMENT OF ASSIGNORS INTEREST	004012	0494	pdf
May 14 1982		Tri-Service Machine Ltd.	(assignment on the face of the patent)

n/a

Date	Maintenance Fee Events

n/a

Date	Maintenance Schedule