Issued Patents 1994
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5355948 | Permeable isolation sectioned screen | Tadayoshi Nagaoka | 1994-10-18 |
| 5355949 | Well liner with dual concentric half screens | Tadayoshi Nagaoka | 1994-10-18 |
| 5307984 | Method of manufacturing a selective isolation screen | Tadayoshi Nagaoka | 1994-05-03 |