Interchangeable Centre for Ring – USA and Canadian patents for Sale

US Ring patent

canadian ring patent     

We are selling a unique item with it’s patented designs.

Our ring design features an interchangeable centre by screwing in the designed centre. Therefore, the ring can have a number of designs just by interchanging the centre.  The ring prototype with 2 interchangeable centres is made of 14kt gold and the centres have a number of gemstones and diamonds that provide a pleasing and beautiful ring.

We have added the value and the description of each ring plus the USA and Canadian patents.  We are offering both the ring with 2 centres and the patents for $5000.00 Canadian.

For inquiries please go to our Enviroquest Ltd. website or call us at our office at 1-519-659-0573.  Please ask for Sherrene.ring appraisals (ignore page 3 of ring appraisal which no longer exist).


About Sherrene

Scientist, Inventor, Researcher, Instructor
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