Duerichen, Johann G. "Wood or Coal Burning Heater." U.S. Patent number 4677965. Washington DC: United States Patent and Trademark Office, 1987.
Duerichen, Johann G. "Wood or Coal Burning Heater." U.S. Patent number 4677965. Washington DC: United States Patent and Trademark Office, 1987.
license
identifier
2000075579
created
2013-05-14T09:09:59
license
title
Duerichen, Johann G. "Wood or ...... nt and Trademark Office, 1987.
shortTitle
Duerichen, Wood or Coal Burning Heater (1987)