Mining Machinery Development Corp.
Records under this name other than patents Mining Machinery Development Corp. holds now: patents now held by others, patents whose terms have ended, and its applications, pending or abandoned.
Showing 1 to 2 of 2 · Back to Mining Machinery Development Corp.
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 4,307,982 | Mobile mine roof support system Term ended Term ended no later than Dec 29, 2001 · Low confidence | Term ended | Term ended no later than Dec 29, 2001 | Low confidence |
| US 4,312,445 | Belt conveyor tandem drive assembly with ground level clean-out clearance Term ended Term ended no later than Jan 26, 2002 · Low confidence | Term ended | Term ended no later than Jan 26, 2002 | Low confidence |