Landis & Gyr Betriebs AG
35Patents
0Active
35Granted
39Portfolio score
Filing activity: Jun 16, 1988 → Jun 2, 1995
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5304813A | Apparatus for the optical recognition of documents | Physics | 234 | Expired |
| US5076441A | Device for the acceptance and delivery of banknotes and process for its operation | Physics | 173 | Expired |
| US5106125A | Arrangement to improve forgery protection of credit documents | Emerging Cross-Sectional Technologies | 117 | Expired |
| US5287516A | Demodulation process for binary data | Electricity | 105 | Expired |
| US5247202A | Plurality of arrangements each including an IC magnetic field sensor and two ferromagnetic field concentrators, and a procedure for incorporating each arrangement into a package | Electricity | 96 | Expired |
| US5032003A | Optially variable surface pattern | Physics | 91 | Expired |
| US5109767A | Device for the embossing of fine structures | Performing Operations; Transporting | 77 | Expired |
| US5124624A | Arrangement for electrical measurement | Physics | 75 | Expired |
| US5032785A | Arrangement for measuring an electrical power or energy | Physics | 50 | Expired |
| US5262715A | Arrangement for the measurement of reactive power or reactive energy | Physics | 42 | Expired |
| US5128537A | Device for optically measuring a pressure differential | Physics | 39 | Expired |
| US5130776A | Ultraviolet-light photodiode | Electricity | 37 | Expired |
| US5034616A | Device for optically scanning sheet-like documents | Physics | 33 | Expired |
| US5276631A | Process for automatic calibration or re-calibration of measurements of a physical variable | Physics | 31 | Expired |
| US5249150A | Process and circuit to determine estimates of the instantaneous value of parameters of at least one sinusoidal signal with constant and known frequency which is an additive component of a measuring signal | Physics | 29 | Expired |
| US5538753A | Security element | Performing Operations; Transporting | 28 | Expired |
| US5714213A | Securtiy element | Emerging Cross-Sectional Technologies | 27 | Expired |
| US5104471A | Interlaminar sandwich with diffraction structure | Emerging Cross-Sectional Technologies | 25 | Expired |
| US5207855A | Apparatus for sticking on stamps from an embossing foil | Emerging Cross-Sectional Technologies | 24 | Expired |
| US5140166A | Device for aligning sheets with plural drive roller groups on a common shaft | Performing Operations; Transporting | 24 | Expired |
| US5231462A | Optical spectrophotometer with wavelength modulation | Physics | 21 | Expired |
| US5119024A | Optical device for sensing magnetic inductions | Physics | 20 | Expired |
| US5047651A | Arrangement for measuring a deviation from its line of a movable web of foil | Physics | 17 | Expired |
| US4910570A | Photo-detector for ultraviolet and process for its production | Electricity | 16 | Expired |
| US5278500A | Planar, core saturation principle, low flux magnetic field sensor | Physics | 15 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.