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Hollowstone LLC molds new paradigm for concrete masonry

After a four-and-half-year struggle with the U.S. Patent and Trademark Office, inventor John August received US Patent #7905070 for an “Interlocking Mortarless Structural Concrete Block Building System.” Years went by as the assigned examiner kept denying his claims; each time the inventor had to rebut the examiner’s take on the proposed patent, but finally 18/22 claims were approved.

Read more: Hollowstone LLC molds new paradigm for concrete masonry