Knudsen Bowl : 네이버 블로그
The Knudsen bowl was invented by George Knudsen of California and patented in 1942 (US #2,272,675). It eclipsed the first rubberriffled centrifuge the Ainlay bowl invented by Thomas Ainlay of Nebraska and patented in 1928 and 1932 (US #1,658,874 and #1,853,249). The Knudsen bowl has particular advantages: