Technofirst
🏢 View company profile →9Patents
2Active
9Granted
33Portfolio score
Filing activity: Sep 15, 1995 → Sep 9, 2013 · 1 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6449369B1 | Method and device for hybrid active attenuation of vibration, particularly of mechanical, acoustic or similar vibration | Physics | 33 | Expired |
| US8893400B2 | Hair dryer having a passive silencer system | Human Necessities | 32 | Active |
| US6285773A | Linear loudspeaker | Electricity | 17 | Expired |
| US7845120B2 | Device for fixing a sound-proofing panel on a wall | Fixed Constructions | 16 | Expired |
| US5987144A | Personal active noise cancellation method and device having invariant impulse response | Physics | 14 | Expired |
| US5744700A | Device for detecting and locating fluid leaks | Physics | 7 | Expired |
| US5943641A | Method and device for recovering a wanted acoustic signal from a composite acoustic signal including interference components | Physics | 5 | Expired |
| US7248704B2 | Active sound attenuation device to be arranged inside a duct, particularly for the sound insulation of a ventilating and/or air conditioning system | Physics | 3 | Expired |
| US8905187B2 | Device and method for manipulating the exhaust outlet noise of a motor vehicle | Emerging Cross-Sectional Technologies | 2 | Active |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.