Mining Machinery Development Corp.
2Patents
0Active
2Granted
22Portfolio score
Filing activity: Mar 6, 1980 → Jun 23, 1980
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4307982A | Mobile mine roof support system | Fixed Constructions | 7 | Expired |
| US4312445A | Belt conveyor tandem drive assembly with ground level clean-out clearance | Performing Operations; Transporting | 0 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.