Charles E. Chang
22Patents
8h-index
29Co-inventors
75Inventor score
Filing activity: Jun 11, 1999 → Jul 17, 2023
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US9009986B1 | Jig for firearm lower receiver manufacture | Emerging Cross-Sectional Technologies | 33 | Active |
| US6563145B1 | Methods and apparatus for a composite collector double heterojunction bipolar transistor | Electricity | 33 | Expired |
| US6526109B1 | Method and apparatus for hybrid smart center loop for clock data recovery | Electricity | 30 | Expired |
| US6316966A | Apparatus and method for servo-controlled self-centering phase detector | Electricity | 23 | Expired |
| US7127391B2 | Method and apparatus for slice point determination | Electricity | 17 | Expired |
| US9810517B2 | Method for machining a firearm lower receiver using a jig | Emerging Cross-Sectional Technologies | 15 | Active |
| US6452433B1 | High phase margin low power flip-flop | Electricity | 15 | Expired |
| US6628605B1 | Method and apparatus for efficiently transmitting multiple data signals | Electricity | 8 | Expired |
| US6636077B1 | High isolation, low power high speed multiplexer circuit | Electricity | 6 | Expired |
| US7499648B2 | Multistage amplifier for rapid acquisition and random received signal power applications | Electricity | 4 | Expired |
| US7813381B2 | Automatic data rate detection | Electricity | 3 | Active |
| US10833379B2 | Electric vehicle with modular removable auxiliary battery with integrated cooling | Emerging Cross-Sectional Technologies | 1 | Active |
| US8761387B2 | Analog transmit crosstalk canceller | Electricity | 1 | Active |
| US11391777B2 | Photodetection sensor for monitoring and fault detection | Emerging Cross-Sectional Technologies | 1 | Active |
| US11796298B2 | Jig for firearm lower receiver manufacture | Emerging Cross-Sectional Technologies | 1 | Active |
| US10886507B2 | Battery pack with laminates to reduce impact of side rupture and method of manufacturing same | Emerging Cross-Sectional Technologies | 0 | Active |
| US11984621B2 | Busbars having stamped fusible links | Emerging Cross-Sectional Technologies | 0 | Active |
| US12431546B2 | Detecting electrolyte on circuit boards | Emerging Cross-Sectional Technologies | 0 | Active |
| US10957892B2 | Busbars having stamped fusible links | Emerging Cross-Sectional Technologies | 0 | Active |
| US11749869B2 | Busbars having stamped fusible links | Emerging Cross-Sectional Technologies | 0 | Active |
| US11860232B2 | Photodetection sensor for monitoring and fault detection | Emerging Cross-Sectional Technologies | 0 | Active |
| US7702030B2 | Module to module signaling with jitter modulation | Electricity | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.