Draw punch
Patent 4353164 Issued on October 12, 1982. Estimated Expiration Date: 
March 20, 2001. 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.
March 20, 2001. 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 1721007 1754568 1817223 2237069 3269011 InventorsAssigneeApplicationNo. 06/245809 filed on 03/20/1981US Classes:30/360With portion positioned in work apertureExaminersPrimary: Kunin, Stephen G.Assistant: Zatarga, J. T. Attorney, Agent or FirmInternational ClassB21D 28/34 (20060101)AbstractThis invention relates to a draw punch and its purpose is to punch a hole in sheet metal or the like, particularly in inaccessible places, such as an electrical outlet box or other terminal outlets. Moreover, the metal slug is split into two pieces and is removed easier.Field of SearchWith portion positioned in work aperture | |
