11th December 1942, Page 36
11th December 1942
Page 36

Page 36, 11th December 1942
Close
Self Changing Gearbox Controlled By Speed And Torque
A Résumé of Patent Specifica. lions That Have Recently Been Published B EARING the name Wind fields, Ltd., Montreal, Canada, patent ,No. 548,044 discloses a design for an......