Brad V. Johnson
35Patents
8h-index
45Co-inventors
75Inventor score
Filing activity: Jun 13, 1994 → Feb 5, 2024
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6658031B2 | Laser apparatus with active thermal tuning of external cavity | Electricity | 39 | Expired |
| US5826325A | Method of merging heads | Emerging Cross-Sectional Technologies | 26 | Expired |
| US5905606A | High-performance disk drive limit stop employing encapsulated visco-elastic material | Physics | 22 | Expired |
| US7230959B2 | Tunable laser with magnetically coupled filter | Electricity | 18 | Expired |
| US5870254A | Transducer suspension system | Physics | 14 | Expired |
| US11057564B2 | Multiple layer flexure for supporting a moving image sensor | Physics | 14 | Active |
| US5442606A | Electromagnetic lens actuator for optical disk drive | Physics | 10 | Expired |
| US6181509A | Low sulfur outgassing free machining stainless steel disk drive components | Physics | 9 | Expired |
| US7937952B2 | Thermoelectric cooler with multiple temperature zones | Mechanical Engineering; Lighting; Heating | 8 | Active |
| US10969652B2 | Camera with folded optics having moveable lens | Electricity | 7 | Active |
| US9424866B1 | Heat assisted magnetic recording write apparatus having a dielectric gap | Physics | 7 | Active |
| US9142233B1 | Heat assisted magnetic recording writer having a recessed pole | Physics | 6 | Active |
| US8953422B1 | Near field transducer using dielectric waveguide core with fine ridge feature | Physics | 5 | Active |
| US8971160B1 | Near field transducer with high refractive index pin for heat assisted magnetic recording | Physics | 5 | Active |
| US8773804B2 | Disk drive internal temperature control system | Physics | 4 | Active |
| US7814643B2 | Method for reducing off-track gain for a disk drive actuator | Emerging Cross-Sectional Technologies | 3 | Active |
| US8958272B1 | Interfering near field transducer for energy assisted magnetic recording | Physics | 3 | Active |
| US9007879B1 | Interfering near field transducer having a wide metal bar feature for energy assisted magnetic recording | Physics | 3 | Active |
| US6750668B1 | Vortex unit for providing a desired environment for a semiconductor process | Electricity | 2 | Expired |
| US7239486B2 | System and apparatus for reducing off-track gain for a disk drive actuator | Emerging Cross-Sectional Technologies | 2 | Expired |
| US11934090B2 | Camera with folded optics having moveable lens | Electricity | 2 | Active |
| US9263071B1 | Flat NFT for heat assisted magnetic recording | Physics | 2 | Active |
| US8976635B1 | Near field transducer driven by a transverse electric waveguide for energy assisted magnetic recording | Physics | 1 | Active |
| US9159346B1 | Near field transducer using dielectric waveguide core with fine ridge feature | Physics | 1 | Active |
| US7042917B2 | Laser apparatus with active thermal tuning of external cavity | Electricity | 1 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.