Article of footwear with a backward extension to the sole
Patent 4238894 Issued on December 16, 1980. Estimated Expiration Date: 
October 10, 1998. 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.
October 10, 1998. 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 2656957 2769252 3283423 InventorApplicationNo. 05/949563 filed on 10/10/1978US Classes:36/25R, SOLES36/140, ORTHOPEDIC BOOT OR SHOE WITH CORRECTIVE ELEMENT36/83BOOTS AND SHOESExaminersPrimary: Kee Chi, JamesAttorney, Agent or FirmInternational ClassA43B 7/00 (20060101)AbstractAn article of footwear is disclosed for enabling a sufferer or potential sufferer of postural low back pain to lean backwards. An integral portion of a ground - engaging sole of the article is a projection which extends backwards at least one inch behind the coronal plane containing the posterior aspect of the heel of the wearer. | |
