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You don't need a mammoth staff or an elaborate office to make millions from your invention.

By Don Debelak •

Opinions expressed by Entrepreneur contributors are their own.

The Inventor: Andrew Dewberry, 43, founder of Vancouver Tool Corp. in Vancouver, British Columbia. He runs the business with his wife, Jayne Seagrave, 42.

Product Description: Dewberry's company specializes in home-renovation products, such as the Caulk-Rite, a tool launched in 1996 that allows users to create a perfect bead of caulk. Subsequent inventions include the Caulk-Away, the Caulk-Injector, Grout-Out and Grout-In.

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