Universal spud wrench
Patent 4237754 Issued on December 9, 1980. Estimated Expiration Date: 
July 12, 1999. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
July 12, 1999. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 2956461 3086414 3156141 InventorAssigneeApplicationNo. 06/056892 filed on 07/12/1979US Classes:81/439, Including discrete, separately usable inserted portions81/436Having work engaging and force exerting portion inserted into cavity (e.g., allen wrench, screwdriver)ExaminersPrimary: Smith, James G.Attorney, Agent or FirmInternational ClassesB25B 13/48 (20060101)B25B 13/00 (20060101) B25B 13/02 (20060101) AbstractA universal spud wrench designed for rapid installation and removal of all types of spuds from drains, etc., including a tubular shaft having four perpendicularly oriented sloped surfaces forming slots, and aligned extensions adjacent said slots which are defined by differing diameters about a central axis. | |
