Tohoku Metal Industries, Ltd.
21Patents
0Active
21Granted
33Portfolio score
Filing activity: Jan 25, 1974 → Mar 24, 1986
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4417207A | Circuit for injecting simulating-noise signals in a power line | Physics | 25 | Expired |
| US4707196A | Ti-Ni alloy articles having a property of reversible shape memory and a method of making the same | Chemistry; Metallurgy | 22 | Expired |
| US4356421A | Piezoelectric resonators of an energy-trapping type of a width extensional vibratory mode | Electricity | 20 | Expired |
| US4449173A | Multi-output-type power supply devices using separately-exciting-type switching regulators | Electricity | 20 | Expired |
| US3959824A | Two gap read/write head assembly | Physics | 20 | Expired |
| US4420804A | Switching regulator with base charge removal circuit | Electricity | 18 | Expired |
| US4126731A | Sapphire single crystal substrate for semiconductor devices | Emerging Cross-Sectional Technologies | 18 | Expired |
| US4024451A | Stabilized DC power supply device | Electricity | 17 | Expired |
| US3990902A | Magnesium-titanate-comprising spinel single crystal substrate for semiconductor devices | Electricity | 10 | Expired |
| US3977917A | Permanent magnet materials | Electricity | 10 | Expired |
| US4363678A | Explosives having powdered ferrite magnet as a tracer dispersed therethrough and a method for producing the same | Emerging Cross-Sectional Technologies | 9 | Expired |
| US4764698A | A.C. electric motors having a stator forming orthogonal magnetic paths | Electricity | 7 | Expired |
| US4758753A | A.C. electric motors having a stator forming orthogonal magnetic paths | Electricity | 5 | Expired |
| US4455179A | Method for the preparation of magnetically traceable explosives | Emerging Cross-Sectional Technologies | 5 | Expired |
| US4537645A | Magnetically traceable explosives with stability and a method for the preparation thereof | Emerging Cross-Sectional Technologies | 5 | Expired |
| US4325042A | Thermo-magnetically operated switches having two different operating temperatures | Electricity | 5 | Expired |
| US4481431A | Circuit for driving a switching transistor | Electricity | 4 | Expired |
| US4389628A | Thermo-magnetically operated switches having two different operating temperatures | Electricity | 3 | Expired |
| US4396895A | Multiple resonant electromechanical filters using edge-mode vibration of a long piezoelectric plate | Electricity | 2 | Expired |
| US4516101A | Air-flow-rate sensors | Electricity | 2 | Expired |
| US4419628A | Transient-noise simulators | Electricity | 1 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.