David K. Donald
24Patents
16h-index
36Co-inventors
81Inventor score
Filing activity: Aug 18, 1980 → May 26, 2004
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4490728A | Thermal ink jet printer | Performing Operations; Transporting | 336 | Expired |
| US6062681A | Bubble valve and bubble valve-based pressure regulator | Emerging Cross-Sectional Technologies | 184 | Expired |
| US6212308A | Thermal optical switches for light | Physics | 144 | Expired |
| US5699462A | Total internal reflection optical switches employing thermal activation | Physics | 136 | Expired |
| US5828799A | Thermal optical switches for light | Physics | 97 | Expired |
| US6320994A | Total internal reflection optical switch | Physics | 95 | Expired |
| US5436925A | Colliding pulse mode-locked fiber ring laser using a semiconductor saturable absorber | Electricity | 86 | Expired |
| US4336544A | Method and apparatus for drop-on-demand ink jet printing | Performing Operations; Transporting | 72 | Expired |
| US5960131A | Switching element having an expanding waveguide core | Physics | 64 | Expired |
| US6360775B1 | Capillary fluid switch with asymmetric bubble chamber | Emerging Cross-Sectional Technologies | 63 | Expired |
| US6888069B1 | Equipment tray for simplified insertion and removal of rack-mounted equipment | Electricity | 59 | Expired |
| US6198856A | Optical switch having test ports | Physics | 44 | Expired |
| US6212956A | High output capacitative gas/liquid detector | Physics | 43 | Expired |
| US5448579A | Polarization independent picosecond fiber laser | Electricity | 42 | Expired |
| US5732168A | Thermal optical switches for light | Physics | 40 | Expired |
| US6299673A | Gas extraction device for extracting gas from a microfluidics system | Performing Operations; Transporting | 25 | Expired |
| US5978527A | Thermal optical switches for light | Physics | 16 | Expired |
| US5365531A | Apparatus and method for initializing an optical-fiber laser for mode locking | Electricity | 14 | Expired |
| US6208778A | Non-perpendicular optical paths for a crosstalk-inhibiting switching arrangement | Physics | 10 | Expired |
| US6398850B1 | Gas extraction device for extracting gas from a microfluidics system | Performing Operations; Transporting | 8 | Expired |
| US5852689A | Method for making fluid optical switches | Physics | 7 | Expired |
| US6415074B1 | Devices and methods for optical communication systems | Electricity | 7 | Expired |
| US4805237A | Parametric diode amplifier | Electricity | 3 | Expired |
| US6407835B1 | Single site for healing dual optical rings | Physics | 1 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.