Symmetricom, Inc.
🏢 View company profile →62Patents
16Active
62Granted
44Portfolio score
Filing activity: Nov 9, 1994 → Dec 1, 2011 · 12 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6181297A | Antenna | Electricity | 156 | Expired |
| US6184845A | Dielectric-loaded antenna | Electricity | 146 | Expired |
| US7142619B2 | Long subscriber loops using automatic gain control mid-span extender unit | Electricity | 110 | Expired |
| US5963180A | Antenna system for radio signals in at least two spaced-apart frequency bands | Electricity | 108 | Expired |
| US5859621A | Antenna | Electricity | 93 | Expired |
| US5945963A | Dielectrically loaded antenna and a handheld radio communication unit including such an antenna | Electricity | 88 | Expired |
| US6690336B1 | Antenna | Electricity | 84 | Expired |
| US5764704A | DSP implementation of a cellular base station receiver | Electricity | 84 | Expired |
| US5457729A | Communication network signalling system link monitor and test unit | Electricity | 71 | Expired |
| US6125125A | Synchronization of TDMA cell sites | Electricity | 64 | Expired |
| US6985499B2 | Precise network time transfer | Electricity | 59 | Expired |
| US6128501A | Mobile position determination with error correction utilizing cellular networks | Electricity | 59 | Expired |
| US5606736A | Heterodyne radio receiver with plural variable frequency local oscillator signals | Electricity | 57 | Expired |
| US7535931B1 | Two-way timing protocol | Electricity | 49 | Active |
| US5832375A | Superheterodyne radio receiver | Electricity | 48 | Expired |
| US6842426B2 | Fault detection for subscriber loop repeaters | Electricity | 42 | Expired |
| US5828670A | Distribution of synchronization in a synchronous optical environment | Electricity | 38 | Expired |
| US6285315A | Positioning systems | Physics | 35 | Expired |
| US5943381A | Multiple input frequency locked loop | Electricity | 27 | Expired |
| US5646519A | Digital phase detector employing a digitally controllable delay line | Electricity | 26 | Expired |
| US5638379A | Encoding system for distribution of synchronization | Electricity | 24 | Expired |
| US5751777A | Multiple input frequency locked loop | Electricity | 23 | Expired |
| US6490296B2 | Multi-link segmentation and reassembly for bonding multiple PVC's in an inverse multiplexing arrangement | Electricity | 23 | Expired |
| US6605849B1 | MEMS analog frequency divider | Electricity | 17 | Expired |
| US7633870B2 | Network forwarding device and method that forward timing packets through the device with a constant delay | Electricity | 17 | Active |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.