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The ornamental design for a twin piston pump, as shown and described. |
FIG. 1 is a front elevational view of a twin piston pump in accordance with the invention;
FIG. 2 is a side elevational view thereof;
FIG. 3 is a side elevational view thereof, illustrating the side opposite that depicted in FIG. 2;
FIG. 4 is a rear elevational view thereof; and,
FIG. 5 is a plan view thereof.
Koch, Drake L., Powers, Richard G.
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Aug 31 1994 | POWERS, RICHARD G | Marlen Research Corporation | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 007139 | /0348 | |
Aug 31 1994 | KOCH, DRAKE L | Marlen Research Corporation | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 007139 | /0348 | |
Sep 09 1994 | Marlen Research Corporation | (assignment on the face of the patent) | / | |||
May 29 2002 | Marlen Research Corporation | PNC Bank, National Association | SECURITY AGREEMENT | 013240 | /0112 | |
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Dec 30 2009 | Marlen Research Corporation | MARLEN INTERNATIONAL, INC | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 023720 | /0505 | |
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Nov 25 2014 | PNC Bank, National Association | MARLEN RSEARCH CORPORATION | PATENT RELEASE | 034703 | /0382 |
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