Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7536831 | Rotatable building | Albert E. Johnstone, III, David A. Berg, Michael L. Rogers | 2009-05-26 |
| 7107725 | Swivel joint apparatus and method for utility supply to a rotatable building | Albert E. Johnstone, III | 2006-09-19 |
| 7032353 | Swivel joint apparatus and method for utility supply to a rotatable building | Albert E. Johnstone, III | 2006-04-25 |
| 6915656 | Heat pump system | — | 2005-07-12 |
| 6418745 | Heat powered heat pump system and method of making same | — | 2002-07-16 |
| 4250715 | Heat transfer systems | — | 1981-02-17 |