Did You Know...
...Daniel Webster invented a "bull plow" to pull out tree stumps. It didn't catch on because it was huge and required four oxen to pull it!
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| Number | Title | Issue Date |
| 4252793 | Injectable lecithin preparation A method of preparing an injectable preparation of lecithin including 1 to 10% lecithin comprises the steps of separately preparing a lecithin fraction including lecithin and a non-hydrous liquid, separately preparing an aqueous fraction containing a surf... | 02/24/1981 |
| 4227277 | Mop head A roofer's mop comprises a plurality of glass yarns with randomly disposed fibers bound together in a fixture to provide a lightweight, bulky mop head which will withstand temperatures in excess of 800° F. to spread molten tar for prolonged periods of us... | 10/14/1980 |
