Robert J. Lang
82Patents
30h-index
106Co-inventors
91Inventor score
Filing activity: Jul 23, 1973 → Mar 5, 2021
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5870417A | Thermal compensators for waveguide DBR laser sources | Electricity | 121 | Expired |
| US5321718A | Frequency converted laser diode and lens system therefor | Electricity | 109 | Expired |
| US4334893A | Recovery of alkali metal catalyst constituents with sulfurous acid | Emerging Cross-Sectional Technologies | 90 | Expired |
| US6240116A | Laser diode array assemblies with optimized brightness conservation | Electricity | 87 | Expired |
| US5912910A | High power pumped mid-IR wavelength systems using nonlinear frequency mixing (NFM) devices | Physics | 86 | Expired |
| US6301273A | Power enhanced frequency conversion system | Physics | 80 | Expired |
| US5355237A | Wavelength-division multiplexed optical integrated circuit with vertical diffraction grating | Electricity | 79 | Expired |
| US5337328A | Semiconductor laser with broad-area intra-cavity angled grating | Electricity | 79 | Expired |
| US5651018A | Wavelength-stabilized, high power semiconductor laser | Electricity | 79 | Expired |
| US4336034A | Process for the catalytic gasification of coal | Emerging Cross-Sectional Technologies | 73 | Expired |
| US6433920B1 | Raman-based utility optical amplifier | Electricity | 72 | Expired |
| US6477295B1 | Pump coupling of double clad fibers | Electricity | 68 | Expired |
| US5537432A | Wavelength-stabilized, high power semiconductor laser | Electricity | 66 | Expired |
| US6122299A | Angled distributed reflector optical device with enhanced light confinement | Electricity | 64 | Expired |
| US4318712A | Catalytic coal gasification process | Chemistry; Metallurgy | 60 | Expired |
| US4720289A | Process for gasifying solid carbonaceous materials | Emerging Cross-Sectional Technologies | 56 | Expired |
| US4617027A | Gasification process | Chemistry; Metallurgy | 53 | Expired |
| US4200439A | Gasification process using ion-exchanged coal | Chemistry; Metallurgy | 53 | Expired |
| US5793521A | Differentially patterned pumped optical semiconductor gain media | Electricity | 52 | Expired |
| US6028722A | Optical beam reconfiguring device and optical handling system for device utilization | Electricity | 49 | Expired |
| US5790576A | High brightness laser diode source | Electricity | 48 | Expired |
| US6014396A | Flared semiconductor optoelectronic device | Electricity | 45 | Expired |
| US4075079A | Process for the production of hydrocarbons from coal | Chemistry; Metallurgy | 44 | Expired |
| US6049554A | External cavity, continuously tunable wavelength source | Electricity | 43 | Expired |
| US5771252A | External cavity, continuously tunable wavelength source | Electricity | 41 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.