Donald E. Johnston
11Patents
6h-index
22Co-inventors
66Inventor score
Filing activity: Jul 28, 1987 → Mar 18, 2014
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4992770A | Fuse with improved spring timer | Electricity | 31 | Expired |
| US6111192A | Height reducible EMI shielded electronic enclosure | Electricity | 18 | Expired |
| US5163668A | Retard pad assembly with movable compliant entrance guide | Performing Operations; Transporting | 16 | Expired |
| US5634188A | Reproduction machine having a high capacity cassette tray assembly | Physics | 10 | Expired |
| US5370381A | Friction retard sheet separator and feeder having reduced noise | Performing Operations; Transporting | 10 | Expired |
| US6186497A | Low cost multiple output sheet inverter | Emerging Cross-Sectional Technologies | 8 | Expired |
| US7415221B2 | Modular media registration systems and methods for printing or image-forming apparatus | Physics | 5 | Expired |
| US8702094B2 | Media registration system with sheet curl control | Performing Operations; Transporting | 2 | Active |
| US4771259A | Electric protective device and method for manufacturing same | Electricity | 2 | Expired |
| US7062218B2 | Quad-roll decurler | Physics | 1 | Expired |
| US9233813B2 | Media registration system with sheet curl control | Performing Operations; Transporting | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.