Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.) Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired - Lifetime Application number Inventor Harwell B Thompson Edward Kaunns Current Assignee (The listed assignees may be inaccurate. Google Patents US3540211A - Horological regulatorÄownload PDF Info Publication number US3540211A US3540211A US3540211DA US3540211A US 3540211 A US3540211 A US 3540211A US 3540211D A US3540211D A US 3540211DA US 3540211 A US3540211 A US 3540211A Authority US United States Prior art keywords hairspring regulator horological opening width Prior art date Legal status (The legal status is an assumption and is not a legal conclusion.
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