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| US4928683 | 2 Feb 1988 | 29 May 1990 | | Respirating apparatus for patients |
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| US6869275 | 14 Feb 2002 | 22 Mar 2005 | Philip Morris USA Inc. | Piezoelectrically driven fluids pump and piezoelectric fluid valve |
| US7841843 | 7 Oct 2004 | 30 Nov 2010 | Samsung Electronics Co., Ltd. | Valveless micro air delivery device |
