Issued Patents 1997
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5636706 | Ladder, member for connecting a rail to a horizontal element of a ladder, and method | David E. Plotner, Edward E. Heald, Frederick J. Bartnicki, Mitchell H. Hetrich | 1997-06-10 |