Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5799705 | Fire resistant pipe | Ralph Friedrich, John F. Kane | 1998-09-01 |
| 5758694 | Fire resistant pipe | Ralph Friedrich, John F. Kane | 1998-06-02 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5799705 | Fire resistant pipe | Ralph Friedrich, John F. Kane | 1998-09-01 |
| 5758694 | Fire resistant pipe | Ralph Friedrich, John F. Kane | 1998-06-02 |