Patent US 3970889A: Difference between revisions
Jump to navigation
Jump to search
No edit summary |
No edit summary |
||
| Line 7: | Line 7: | ||
|Filing date=1973-11-21 | |Filing date=1973-11-21 | ||
|Grant date=1976-07-20 | |Grant date=1976-07-20 | ||
|Cites=Patent US 3796910A;Patent US 3293473A;Patent US 3312850A; | |||
}} | }} | ||
See [[7912]], [[T7912]]. | |||