Assembly And Manufacture (assembly And Manufacture Of Springs Subclass 11; Machines And Tools For The Manufacture Of Chain Wheels For Clocks Subclass 685; Component Parts And Manufacture Of The Escape Wheel Subclass 102; Steel Alloys C21c 33/00-41/00; Manufacture Of Pinions From Synthetic Material B29; Nonferrous Alloys C22c; Pinions Manufactured By Milling And Planing B23f) Operating Mechanisms [g04b 13/02r] Patents (Class 968/94)