Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11739587 | Doors and methods for reducing telegraphing therefor | Michael J. Marvel, Dale W. Mayfield, Steven B. Swartzmiller | 2023-08-29 |
| 11414920 | Doors and methods for reducing telegraphing therefor | Michael J. Marvel, Dale W. Mayfield, Steven B. Swartzmiller | 2022-08-16 |
| 10927593 | Doors and methods for reducing telegraphing therefor | Michael J. Marvel, Dale W. Mayfield, Steven B. Swartzmiller | 2021-02-23 |
| D478387 | Door | JD Beitzinger, Tony R. Speer | 2003-08-12 |
| D466615 | Door | JD Beitzinger, Tony R. Speer | 2002-12-03 |