Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4615053 | Pipe coupling with water seal between the sinks of a drain board and the drain pipe | Kalervo Mannisto, Eero Saarinen | 1986-10-07 |
| 4487219 | Floor drain or some other cupped water seal | Paavo M/a/ kel/a/, Kalervo M/a/ nnist/o/ | 1984-12-11 |