| http://www.w3.org/ns/prov#value | - In a prior Patent Number 1,466,559, granted to me, August 28, 1923, I have shown such a device. but in the device of said patent, it is possible to exert traction `in one direction only and it has been found in actual practice that while the device of my prior patent produces many benecial results, it does not produce maximum ex- 15' ercising of the teeth, gums, jaws and other organs.
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