Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4572957 | Means for creating an electron curtain | Pertti Puumalainen | 1986-02-25 |
| 4543487 | Procedure and means for creating an electron curtain with adjustable intensity distribution | Pertti Puumalainen, Rauno Rantanen | 1985-09-24 |