Howard Johnson, Permanent Magnet Motor, 1985, (patent expired 2006)rexresearch.com 2 pointsthro110 months ago1 commentSaveHideCopy link On HNComments−thro1OP10mo( https://patents.google.com/patent/US4877983A/en expired 2006, https://www.freepatentsonline.com/4877983.html )Is that similar: https://news.ycombinator.com/item?id=45600132 ?
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( https://patents.google.com/patent/US4877983A/en expired 2006, https://www.freepatentsonline.com/4877983.html )
Is that similar: https://news.ycombinator.com/item?id=45600132 ?