Qiufeng Ma
35Patents
2h-index
34Co-inventors
49Inventor score
Filing activity: Dec 18, 2014 → May 14, 2021
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US9618484B2 | General sample injector, gas chromatograph and combined spectrometer | Physics | 2 | Active |
| US10215666B2 | Sample injection device and method for sample collection and sample thermal desorption, and trace detection apparatus | Physics | 2 | Active |
| US10539531B2 | Detection apparatus and detection method | Physics | 2 | Active |
| US9513266B2 | Gas chromatograph-ion mobility spectrometer system | Electricity | 1 | Active |
| US10281431B2 | Darkroom type security inspection apparatus and method | Physics | 1 | Active |
| US9261610B2 | High purity germanium detector | Physics | 1 | Active |
| US10281432B2 | Detection apparatus and detection method | Physics | 1 | Active |
| US11408852B2 | Sampling tube bundle, sampling analysis device and preparation method of sampling tube bundle | Physics | 1 | Active |
| US10699887B2 | Preparation and feed apparatus of standard sample for calibration of trace-analysis instrument | Physics | 1 | Active |
| US10151671B2 | Sampling device and gas curtain guide | Physics | 1 | Active |
| US10276359B2 | Ion mobility spectrometer | Electricity | 0 | Active |
| US10775278B2 | Scrubbing and sampling device, card reader apparatus and gate apparatus | Physics | 0 | Active |
| US10989689B2 | Gas chromatography-ion mobility spectrometry detector and gas chromatograph-ion mobility spectrometer | Physics | 0 | Active |
| US10234436B2 | Gas chromatography-ion mobility spectrometry apparatus | Physics | 0 | Active |
| US10782211B2 | Gathering and sampling device and inspection apparatus | Physics | 0 | Active |
| US11422070B2 | Sampling probe, automatic sampling device, and container detection system | Physics | 0 | Active |
| US10408804B2 | Darkroom type security inspection apparatus and method | Physics | 0 | Active |
| US11193860B2 | Gas purifying device and ion migration spectrometer | Physics | 0 | Active |
| US11346807B2 | Pulsed sampling-based ion mobility spectrometer and sniffer | Physics | 0 | Active |
| US11320407B2 | Gas chromatograph-ion mobility spectrometry combined equipment | Physics | 0 | Active |
| US10520402B2 | Sample collecting and introducing device and detection system | Physics | 0 | Active |
| US11022581B2 | Multiple functions ion mobility spectrometer device | Electricity | 0 | Active |
| US10663429B2 | Device for collecting semi-volatile or non-volatile substrate | Physics | 0 | Active |
| US11400407B2 | Decomposition method and apparatus based on basis material combination | Physics | 0 | Active |
| US9772306B2 | Gas analyzing apparatus and sampling device | Physics | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.