Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7487821 | Fireplace augmented chimney heat exchange system | Robert Miller | 2009-02-10 |
| 6886626 | Chimney heat exchange system | Robert Miller | 2005-05-03 |
| 6772452 | Laminar flow attachment for controlling toilet bowl splashing | Robert Miller | 2004-08-10 |
| 4889880 | Modified asphalt compositions | — | 1989-12-26 |