Inventor · Beijing, CN

Qiufeng Ma

35Patents
2h-index
34Co-inventors
49Inventor score

Filing activity: Dec 18, 2014 → May 14, 2021

Most-cited inventions

PatentTitleAreaCited byStatus
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.