File:Wingquist patent PRV 25406 1907b.png - Wikipedia

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current	11:30, 26 August 2020		2,337 × 2,909 (148 KB)	Materialscientist	{{Information |Description={{en|1=Sven Wingquist patent drawing, PRV (Patent office Sweden), patent no. 25406 for the multirow self alining ball bearing, 1907.}} |Source=File:Swedish patent 25406 Anordning vid kullager.pdf |Author=Sven Wingquist |Date=1907 |Permission={{PD-Sweden-photo}} |other_versions= }} Category:Patent drawings

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