Musical shoe
Patent 4043241 Issued on August 23, 1977. Estimated Expiration Date: 
August 23, 1994. 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.
August 23, 1994. 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 1744513 1943222 2320560 2644248 2735220 2933832 2940184 3501144 3702999 3791375 AbstractA shoe provided with a plurality of keys on the underside thereof which when depressed will produce various musical tones by means of an electronic circuit provided inside the shoe. | |
