Deimen, Michael L. "Construction Block." U.S. Patent number 4633639. Washington DC: United States Patent and Trademark Office, 1987.
Deimen, Michael L. "Construction Block." U.S. Patent number 4633639. Washington DC: United States Patent and Trademark Office, 1987.
license
identifier
2000075448
created
2013-05-06T09:46:43
license
title
Deimen, Michael L. "Constructi ...... nt and Trademark Office, 1987.
shortTitle
Deimen, Construction Block (1987)