Stephen Ma
24Patents
14h-index
29Co-inventors
81Inventor score
Filing activity: Nov 27, 1989 → Nov 11, 2019
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US7158878B2 | Digital mapping system | Emerging Cross-Sectional Technologies | 545 | Expired |
| US7379811B2 | Digital mapping system | Emerging Cross-Sectional Technologies | 463 | Active |
| US7962281B2 | Generating and serving tiles in a digital mapping system | Physics | 341 | Active |
| US7894984B2 | Digital mapping system | Emerging Cross-Sectional Technologies | 286 | Active |
| US4998111A | CPS transform correlation receiver and method | Physics | 163 | Expired |
| US6954463B1 | Distributed packet processing architecture for network access servers | Electricity | 157 | Expired |
| US7599790B2 | Generating and serving tiles in a digital mapping system | Physics | 151 | Active |
| US7606245B2 | Distributed packet processing architecture for network access servers | Electricity | 135 | Active |
| US7616646B1 | Intraserver tag-switched distributed packet processing for network access servers | Electricity | 78 | Expired |
| US5619211A | Position locating and communication system using multiple satellite constellations | Electricity | 67 | Expired |
| US6441694B1 | Method and apparatus for generating digitally modulated signals | Electricity | 63 | Expired |
| US6075484A | Method and apparatus for robust estimation of directions of arrival for antenna arrays | Electricity | 60 | Expired |
| US6169522A | Combined mechanical scanning and digital beamforming antenna | Electricity | 58 | Expired |
| US8014946B2 | Digital mapping system | Emerging Cross-Sectional Technologies | 21 | Active |
| US7778347B2 | Power de-rating reduction in a transmitter | Electricity | 8 | Active |
| US8700776B2 | System and method for editing a conversation in a hosted conversation system | Electricity | 4 | Active |
| US9842380B2 | Digital mapping system | Emerging Cross-Sectional Technologies | 3 | Active |
| US7990941B2 | Adaptive antenna system signal detection | Electricity | 2 | Active |
| US9294421B2 | System and method for merging edits for a conversation in a hosted conversation system | Electricity | 1 | Active |
| US10475157B2 | Digital mapping system | Emerging Cross-Sectional Technologies | 0 | Active |
| US8984139B2 | System and method for editing a conversation in a hosted conversation system | Electricity | 0 | Active |
| US10152770B2 | Digital mapping system | Emerging Cross-Sectional Technologies | 0 | Active |
| US12008727B2 | Digital mapping system | Emerging Cross-Sectional Technologies | 0 | Active |
| US9083496B2 | Adaptive antenna system signal detection | Electricity | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.