From squirts to hertz [Lonnie Johnson, inventor].
With more than 100 awarded and pending patents-for everything from hair-drying rollers to soil moisture meters-Lonnie Johnson is among a small group of African-American inventors whose work accounts for 6 percent of all US patent applications. the young Johnson was known around his neighborhood as &...
| 发表在: | IEEE spectrum 39, 7(duplicate) (2002). |
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| 格式: | 文件 |
| 语言: | English |
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