Issued Patents 2002
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6357549 | Guide rail climbing lifting platform and method | Donald D. Brennan, Brent R. Leisening, George Burkhart, Ralph Douglas Fredrickson | 2002-03-19 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6357549 | Guide rail climbing lifting platform and method | Donald D. Brennan, Brent R. Leisening, George Burkhart, Ralph Douglas Fredrickson | 2002-03-19 |