UMAC Incorporated
10Patents
1Active
10Granted
33Portfolio score
Filing activity: Jul 16, 1979 → Apr 26, 2006 · 1 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5704391A | Gravity-operated gas shut-off valve | Emerging Cross-Sectional Technologies | 37 | Expired |
| US4465309A | Connecting or repair device | Emerging Cross-Sectional Technologies | 29 | Expired |
| US4394202A | Method for relining an underground gas line or the like without excavation | Emerging Cross-Sectional Technologies | 27 | Expired |
| US4410391A | Apparatus for relining an underground gas line or the like without excavation | Emerging Cross-Sectional Technologies | 25 | Expired |
| US4958657A | Gas supply safety device | Emerging Cross-Sectional Technologies | 24 | Expired |
| US5551476A | Balanced-flow gas safety valve | Emerging Cross-Sectional Technologies | 14 | Expired |
| US4295494A | Method and apparatus for plugging and cutting a gas line or the like without excavation | Emerging Cross-Sectional Technologies | 12 | Expired |
| US7562668B2 | Excess flow valves | Emerging Cross-Sectional Technologies | 10 | Active |
| US6814101B2 | Excessive flow valve | Emerging Cross-Sectional Technologies | 10 | Expired |
| US4549752A | Connector for tubular members | Emerging Cross-Sectional Technologies | 9 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.