Sparta, Inc.
🏢 View company profile →22Patents
4Active
22Granted
39Portfolio score
Filing activity: Aug 2, 1983 → May 7, 2008 · 4 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6273914A | Spinal implant | Emerging Cross-Sectional Technologies | 223 | Expired |
| US5404222A | Interferametric measuring system with air turbulence compensation | Physics | 71 | Expired |
| US5319629A | Content addressable optical data storage system | Physics | 49 | Expired |
| US5537209A | An interferometric measuring system having temperature compensation and improved optical configurations | Physics | 43 | Expired |
| US5991033A | Interferometer with air turbulence compensation | Physics | 34 | Expired |
| US4513441A | Image comparison system | Physics | 32 | Expired |
| US6040843A | System for transmission and recovery of digital data using video graphics display processor and method of operation thereof | Physics | 31 | Expired |
| US5835102A | System for transmission and recovery of digital data using video graphics display processor and method of operation thereof | Physics | 14 | Expired |
| US5543914A | Apparatus and methods employing harmonic analysis for measuring the difference in phase between two coherent beams | Physics | 13 | Expired |
| US7525102B1 | Agent detection in the presence of background clutter | Physics | 12 | Active |
| US4897843A | Frequency-agile laser systems | Electricity | 11 | Expired |
| US7890763B1 | Method of identifying invalid digital signatures involving batch verification | Electricity | 11 | Active |
| US7242342B2 | Super-resolution based on frequency domain interferometric processing of sparse multi-sensor measurements | Physics | 10 | Expired |
| US4998236A | Apparatus for high density holographic optical data storage | Physics | 9 | Expired |
| US5537881A | Fluid sampling device | Physics | 8 | Expired |
| US5355456A | Pebble-bed evaporation and superheater assembly for vaporizing and heating a liquified cryogenic gas | Physics | 7 | Expired |
| US5197323A | Pebble-bed heater and shock tube assembly | Physics | 5 | Expired |
| US7869043B2 | Automated passive skin detection system through spectral measurement | Physics | 3 | Active |
| US5081361A | Passive atomic resonance filter | Physics | 3 | Expired |
| US5299866A | Pebble-bed heater and shock tube assembly | Physics | 2 | Expired |
| US7088495B2 | Method and apparatus for time-division multiplexing to improve the performance of multi-channel non-linear optical systems | Electricity | 2 | Expired |
| US8014959B2 | Population of background suppression lists from limited data in agent detection systems | Physics | 0 | Active |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.