Patents per Year
Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date | Approx Value ⓘ |
|---|---|---|---|---|
| 5881898 | Open top drum having ribbed chime | Patrick Irwin | 1999-03-16 | $10,600,000 |
| 5554335 | Process for engraving ceramic surfaces using local laser vitrification | Dan Fredrick, Steve Grannemann, Phyllis Hannan, Igor Lukashevsky | 1996-09-10 | $638,000 |
| D359150 | Drum | John H. Malik, Patrick Irwin, Floy C. Jones | 1995-06-06 | |
| 4870789 | Manufactured building adjustable leveling and support device | Steven Clark | 1989-10-03 |