Assignee
No assignee recorded.
Inventors
- Ulf Lindahl (8 patents)
- Gudrun Backstrom (4 patents)
- John Y. L. Thunberg (2 patents)
- Unknown
- Lars Andersson (8 patents)
- Erik Holmer (5 patents)
- Inga H. Sandberg (3 patents)
- Unknown
US Patent 4303651 · Granted Dec 1, 1981
No assignee recorded.