AICHI TOKEI DENKI CO., LTD.
22Patents
4Active
22Granted
35Portfolio score
Filing activity: Nov 14, 1979 → Oct 20, 2016 · 2 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4969363A | Electromagnetic flowmeter capable of simultaneous measurement of flow rate and conductivity of fluid | Physics | 58 | Expired |
| US4306457A | Liquid meter comprising a circuit for reducing a detection error resulting from a variable flow rate | Physics | 35 | Expired |
| US4409846A | Electromagnetic flow meter | Physics | 34 | Expired |
| US4736635A | Electromagnetic flowmeter | Physics | 16 | Expired |
| US4601209A | Electromagnetic flowmeter of the residual magnetism type | Physics | 16 | Expired |
| US5583299A | Conduit for an electromagnetic flowmeter using magnetic poles as ground electrodes | Physics | 14 | Expired |
| USD675121S1 | Water meter | General | 13 | Active |
| US4856345A | Method and apparatus for making compensation for DC offset voltage generated in aplifying circuit in electromagnetic flowmeter | Physics | 12 | Expired |
| US5335553A | Fluidic gas meter provided with a printed wiring board | Emerging Cross-Sectional Technologies | 11 | Expired |
| US5369999A | Non-full state detecting apparatus and method | Physics | 9 | Expired |
| US5625155A | Electromagnetic flowmeter | Physics | 8 | Expired |
| US4736634A | Magnetic field generating device for electromagnetic flowmeter of residual magnetization type | Physics | 8 | Expired |
| US5677496A | Electromagnetic flow meter removing influence of fluctuation in direct-current offset voltage | Physics | 6 | Expired |
| US4755703A | Electric motor | Electricity | 6 | Expired |
| US5218872A | Fluidic flowmeter for use with disturbed fluids | Physics | 5 | Expired |
| US5524493A | Electromagnetic flowmeter | Physics | 3 | Expired |
| US4716769A | Radial field electromagnetic flow meter | Physics | 3 | Expired |
| US6508116B1 | Water bike equipped with speed meter | Physics | 2 | Expired |
| US4795267A | Calorimeter using remanence type electromagnetic flowmeter | Physics | 1 | Expired |
| USD674299S1 | Water meter | General | 1 | Active |
| US9752906B2 | Flow volume detector | Human Necessities | 1 | Active |
| US11060898B2 | Flowmeter having a leak prevention arrangement from a gap between the outer case and the inner case | Physics | 0 | Active |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.