The Summa Group Limited
13Patents
0Active
13Granted
35Portfolio score
Filing activity: Apr 18, 1973 → Aug 12, 1986
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4782603A | Midsole | Human Necessities | 70 | Expired |
| US4200252A | Helicopter antitorque system using circulation control | Performing Operations; Transporting | 66 | Expired |
| US3948295A | Insulation system | Emerging Cross-Sectional Technologies | 51 | Expired |
| US4149739A | Dual passage pipe for cycling water to an undersea mineral aggregate gathering apparatus | Mechanical Engineering; Lighting; Heating | 50 | Expired |
| US4059685A | Immobilized immunoadsorbent | Emerging Cross-Sectional Technologies | 49 | Expired |
| US4037751A | Insulation system | Emerging Cross-Sectional Technologies | 44 | Expired |
| US4170896A | Balancing of high-speed shafts | Physics | 17 | Expired |
| US4012989A | Inertial free-sight system | Mechanical Engineering; Lighting; Heating | 14 | Expired |
| US3930627A | Radiation shielding and gas diffusion apparatus | Performing Operations; Transporting | 13 | Expired |
| US4141159A | Method and apparatus for deep sea mining | Mechanical Engineering; Lighting; Heating | 10 | Expired |
| US4232093A | High temperature skin construction | Emerging Cross-Sectional Technologies | 5 | Expired |
| US4200837A | Remote radio selector with manual override | Electricity | 4 | Expired |
| US4258890A | Trimmable feel system for aircraft control | Emerging Cross-Sectional Technologies | 3 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.