Donald C. D. Chang
65Patents
17h-index
21Co-inventors
84Inventor score
Filing activity: Oct 9, 1987 → Jun 29, 2021
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4822470A | Method of and apparatus for cell poration and cell fusion using radiofrequency electrical pulses | Chemistry; Metallurgy | 146 | Expired |
| US4970154A | Method for inserting foreign genes into cells using pulsed radiofrequency | Chemistry; Metallurgy | 117 | Expired |
| US7609198B2 | Apparatus and method for radar imaging by measuring spatial frequency components | Physics | 87 | Active |
| US6941138B1 | Concurrent communications between a user terminal and multiple stratospheric transponder platforms | Electricity | 66 | Expired |
| US6895217B1 | Stratospheric-based communication system for mobile users having adaptive interference rejection | Electricity | 55 | Expired |
| US7257418B1 | Rapid user acquisition by a ground-based beamformer | Electricity | 50 | Expired |
| US8767615B2 | Concurrent airborne communication methods and systems | Physics | 48 | Active |
| US5304486A | Method of and apparatus for cell portion and cell fusion using radiofrequency electrical pulse | Chemistry; Metallurgy | 37 | Expired |
| US6756937B1 | Stratospheric platforms based mobile communications architecture | Electricity | 33 | Expired |
| US6785553B2 | Position location of multiple transponding platforms and users using two-way ranging as a calibration reference for GPS | Physics | 30 | Expired |
| US7786933B2 | Digital beam-forming apparatus and technique for a multi-beam global positioning system (GPS) receiver | Electricity | 24 | Active |
| US7339520B2 | Phased array terminal for equatorial satellite constellations | Electricity | 24 | Expired |
| US6990314B1 | Multi-node point-to-point satellite communication system employing multiple geo satellites | Electricity | 24 | Expired |
| US6757546B1 | Synchronization method and apparatus for multi-platform communication system | Electricity | 23 | Expired |
| US8098612B2 | Apparatus and method for remote beam forming for satellite broadcasting systems | Electricity | 22 | Active |
| US7400857B2 | Communication system using multiple link terminals | Electricity | 19 | Expired |
| US8035562B2 | Digital beam-forming apparatus and technique for a multi-beam global positioning system (GPS) receiver | Electricity | 19 | Active |
| US7317916B1 | Stratospheric-based communication system for mobile users using additional phased array elements for interference rejection | Electricity | 15 | Expired |
| US6751458B1 | Architecture utilizing frequency reuse in accommodating user-link and feeder-link transmissions | Electricity | 14 | Expired |
| US6963548B1 | Coherent synchronization of code division multiple access signals | Electricity | 13 | Expired |
| US9621254B2 | Communications architectures via UAV | Electricity | 11 | Active |
| US8232918B2 | Digital beam-forming apparatus and technique for a multi-beam global positioning system (GPS) receiver | Electricity | 11 | Active |
| US7809403B2 | Stratospheric platforms communication system using adaptive antennas | Electricity | 11 | Expired |
| US9780859B2 | Multi-user MIMO via active scattering platforms | Electricity | 9 | Active |
| US6914557B2 | Micro cell architecture for mobile user tracking communication system | Electricity | 8 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.