Bertram C. Johnson
15Patents
11h-index
12Co-inventors
69Inventor score
Filing activity: Dec 2, 1975 → Jun 8, 2016
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4873692A | Pulsed tunable solid state laser | Electricity | 50 | Expired |
| US4019156A | Active/passive mode-locked laser oscillator | Electricity | 40 | Expired |
| US5390211A | Optical parametric oscillator with unstable resonator | Physics | 38 | Expired |
| US5272713A | High repetition rate pulsed laser | Electricity | 28 | Expired |
| US5001716A | Tunable electro-optic Q-switch, and lasers using same | Electricity | 18 | Expired |
| US4918395A | Multipass laser amplifier with at least one expanded pass | Electricity | 15 | Expired |
| US4955725A | Laser oscillator/amplifier with compensation for stress birefringence | Electricity | 14 | Expired |
| US4872181A | Laser resonator with laser medium exhibiting thermally induced birefringence | Electricity | 14 | Expired |
| US4935932A | Apparatus using induced birefringence to improve laser beam quality | Electricity | 12 | Expired |
| US4894837A | Absorbing filter in pump cavity for control of beam quality | Electricity | 12 | Expired |
| US5477378A | Multiple crystal non-linear frequency conversion apparatus | Physics | 12 | Expired |
| US4404821A | Yarn feeder and changer unit | Textiles; Paper | 7 | Expired |
| US9568803B2 | Cascaded optical harmonic generation | Physics | 3 | Active |
| US4612785A | Dials for circular knitting machines | Textiles; Paper | 1 | Expired |
| US4253316A | Shogging mechanisms | Textiles; Paper | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.