Lawrence Welk, the bandleader who entertained millions of Americans over a generation of broadcasting his TV show, once received a patent: for a music-themed design of an ashtray.
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| Number | Title | Issue Date |
| 7368132 | Glyoxal/zinc fixative This invention provides compositions and methods for fixing a biological sample, particularly fecal samples for diagnosis of parasitic infection. The fixative composition of the present invention comprises glyoxal (pyruvate aldehyde) and zinc sulfate and permits sta... | 05/06/2008 |