| 10101023 |
Solid fuel heating device |
Robert W. Ferguson, Stephen F. Richardson |
2018-10-16 |
| 8561602 |
Gas feature and method |
Stephen F. Richardson, Douglas DeFouw |
2013-10-22 |
| 7967008 |
Fireplace combustion system |
Robert W. Ferguson |
2011-06-28 |
| D515679 |
Outdoor fireplace |
James Borowske, Robert W. Ferguson, Stephen F. Richardson |
2006-02-21 |
| D515680 |
Outdoor fireplace |
James Borowske, Robert W. Ferguson, Stephen F. Richardson |
2006-02-21 |
| D513796 |
Outdoor fireplace |
James Borowske, Robert W. Ferguson, Stephen F. Richardson |
2006-01-24 |
| D513312 |
Outdoor fireplace |
James Borowske, Robert W. Ferguson, Stephen F. Richardson |
2005-12-27 |
| 5413089 |
Wood and coal burning stove |
Robert W. Ferguson, Dane P. Harman |
1995-05-09 |
| 5137012 |
Pellet burning stove |
William W. Crossman, Jr., Richard Simon Blackburn, Allan S. Wilker, John H. Guest |
1992-08-11 |
| 4865011 |
Solid fuel burning space heating appliances |
John N. Stancliffe, Stephen Carnelly, Robert W. Ferguson |
1989-09-12 |
| 4856491 |
High efficiency solid fuel burning stove |
Robert W. Ferguson |
1989-08-15 |
| 4683868 |
Wood burning stove having glass cleaning system |
Robert W. Ferguson, E. Smith Reed, Jr. |
1987-08-04 |
| 4646712 |
Solid fuel heating appliances |
Robert W. Ferguson, William W. Crossman, Jr. |
1987-03-03 |
| 4582044 |
Clean burning exterior retrofit system for solid fuel heating appliances |
Robert W. Ferguson, William W. Crossman, Jr. |
1986-04-15 |
| 4510918 |
Woodburning heating apparatus |
Robert W. Ferguson, William W. Crossman, Jr. |
1985-04-16 |
| 4487195 |
Fuel burning heating apparatus |
Duncan C. Syme, Eldon L. Caldwell, Robert W. Ferguson, Charles B. McLaughlin, Jr. |
1984-12-11 |