Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4475471 | Bio-mass burner with grate therefor and method of operation | Calvin H. Hand, Jr., David J. Hand | 1984-10-09 |
| 4395956 | Bio-mass burner with grate therefor and method of operation | Calvin H. Hand, Jr., David J. Hand | 1983-08-02 |
| 4341199 | Bio-mass burner with grate therefor and method of operation | Calvin H. Hand, Jr., David J. Hand | 1982-07-27 |