Did You Know...
...When G.G. Hubbard learned of his future son-in-law's invention, he called it "only a toy." His daughter was engaged to a young man named Alexander Graham Bell.
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| Number | Title | Issue Date |
| 6056275 | Device for introducing gas into liquids In a device for introducing gases into liquids, in particular water, at least one prefilter being incorporated into the liquid feed, followed by an atomization device with a connection to a gas supply, and at least one further postfilter being incorporate... | 05/02/2000 |
