National Research Council of Canada
978Patents
475Active
978Granted
55Portfolio score
Filing activity: Apr 28, 1981 → May 30, 2023 · 164 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5411866A | Method and system for determining bioactive substances | Physics | 454 | Expired |
| US6009359A | Mobile system for indoor 3-D mapping and creating virtual environments | Physics | 387 | Expired |
| US6060451A | Thrombin inhibitors based on the amino acid sequence of hirudin | Human Necessities | 358 | Expired |
| US5735278A | Surgical procedure with magnetic resonance imaging | Physics | 264 | Expired |
| US5619059A | Color deformable mirror device having optical thin film interference color coatings | Physics | 256 | Expired |
| US5117237A | Quasi-optical stripline devices | Electricity | 225 | Expired |
| US6470307B1 | Method and apparatus for automatically identifying keywords within a document | Physics | 203 | Expired |
| US5347459A | Real time collision detection | Physics | 152 | Expired |
| US5319611A | Method of determining range data in a time-of-flight ranging system | Emerging Cross-Sectional Technologies | 142 | Expired |
| US7684105B2 | Microblinds and a method of fabrication thereof | Physics | 142 | Active |
| US6453247B1 | PC multimedia-based leak detection system for water transmission and distribution pipes | Physics | 139 | Expired |
| US6915154B1 | Method and apparatus for performing intra-operative angiography | Human Necessities | 135 | Expired |
| US5549953A | Optical recording media having optically-variable security properties | Emerging Cross-Sectional Technologies | 129 | Expired |
| US5494513A | Zeolite-based lightweight concrete products | Chemistry; Metallurgy | 125 | Expired |
| US6583808B2 | Method and system for stereo videoconferencing | Electricity | 122 | Expired |
| US5972120A | Extraction of sweet compounds from Stevia rebaudiana Bertoni | Human Necessities | 119 | Expired |
| US7796243B2 | Detection and monitoring of changes in mineralized tissues or calcified deposits by optical coherence tomography and Raman spectroscopy | Human Necessities | 114 | Active |
| US4943292A | Plate for broken bone fixation | Emerging Cross-Sectional Technologies | 113 | Expired |
| US6504149B2 | Apparatus and method for desolvating and focussing ions for introduction into a mass spectrometer | Electricity | 104 | Expired |
| US6269540A | Process for manufacturing or repairing turbine engine or compressor components | Emerging Cross-Sectional Technologies | 102 | Expired |
| US6239449A | Quantum dot infrared photodetectors (QDIP) | Electricity | 100 | Expired |
| US5473474A | Panoramic lens | Physics | 93 | Expired |
| US6660224B2 | Method of making open cell material | Performing Operations; Transporting | 88 | Expired |
| US5471541A | System for determining the pose of an object which utilizes range profiles and synethic profiles derived from a model | Physics | 88 | Expired |
| US6621077B1 | Apparatus and method for atmospheric pressure-3-dimensional ion trapping | Physics | 86 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.