Issued Patents 1982
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4358223 | Method and apparatus for constructing buried pipeline systems | Christopher E. Heuer, Hsiu-Hsyong Hsu | 1982-11-09 |
| 4325655 | Multiple slope structure | Richard T. Weiss | 1982-04-20 |