Learning device and method of using same
Patent 4764119 Issued on August 16, 1988. Estimated Expiration Date: 
May 4, 2007. 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.
May 4, 2007. 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 2313874 2646630 2991561 3571951 Shoe tying instructional device Patent #: 4017984 InventorApplicationNo. 07/045575 filed on 05/04/1987US Classes:434/260, Manipulation of tool or fastener (e.g., zipper, shoelaces, etc.)24/712DRAWSTRING, LACED-FASTENER, OR SEPARATE ESSENTIAL COOPERATING DEVICE THEREFORExaminersPrimary: Grieb, William H.Attorney, Agent or FirmInternational ClassG09B 19/00 (20060101)AbstractA teaching device for pre-school aged children and method of using the same whereby each such child is provided with and thereafter repetitiously drilled with the hand-eye mechanics for tying a bow knot in a string or lace. Each device comprises an elongated body portion having first and second end portions which are readily distinguished from each other by color or feel and an intermediate portion interconnecting the end portion. | |
