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The ornamental design for a differential pressure generator, as shown and described.
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The broken lines shown in the figures are for illustrative purposes only and form no part of the claimed design.
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Dec 10 2007 | NIMBERGER, SPENCER M | PGI International, Ltd | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 020337 | /0186 | |
Dec 20 2007 | PGI International, Ltd. | (assignment on the face of the patent) | / | |||
Sep 16 2011 | PGI International, Ltd | AMEGY BANK NATIONAL ASSOCIATION AS ADMINISTRATIVE AGENT | SECURITY AGREEMENT | 027380 | /0507 | |
Dec 31 2013 | PGI International, Ltd | Parker-Hannifin Corporation | MERGER SEE DOCUMENT FOR DETAILS | 047132 | /0663 |
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