Wireless Access
23Patents
0Active
23Granted
34Portfolio score
Filing activity: Aug 25, 1992 → Jul 28, 1998
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5557642A | Direct conversion receiver for multiple protocols | Electricity | 177 | Expired |
| US6018553A | Multi-level mixer architecture for direct conversion of FSK signals | Electricity | 119 | Expired |
| US5428638A | Method and apparatus for reducing power consumption in digital communications devices | Emerging Cross-Sectional Technologies | 114 | Expired |
| US6259911A | Network operations center hardware and software design | Electricity | 70 | Expired |
| US5631503A | Apparatus for generating power for use in a communications device | Electricity | 39 | Expired |
| US6173164A | Method and apparatus for wide range automatic frequency control | Electricity | 35 | Expired |
| US6049290A | Control button interface for a portable communications device | Electricity | 35 | Expired |
| US6381241B1 | Duplicate message detection and mending of garbled messages | Electricity | 35 | Expired |
| US6088457A | Method and apparatus for over the air programming a communication device | Electricity | 34 | Expired |
| US5345406A | Bandpass sigma delta converter suitable for multiple protocols | Electricity | 33 | Expired |
| US5563772A | Rigidized outer support structure for an integrated circuit card | Electricity | 30 | Expired |
| US5854595A | Communications apparatus and method with a computer interchangeable integrated circuit card | Electricity | 26 | Expired |
| US6216001A | Service level indication and registration processing in a wireless communication device | Electricity | 23 | Expired |
| US6058150A | Method and apparatus for combined timing recovery, frame synchronization and frequency offset correction in a receiver | Electricity | 22 | Expired |
| USD409195S | Pager | General | 21 | Expired |
| US5406226A | Stable, narrow bandwidth, high frequency amplifier with low power consumption | Electricity | 21 | Expired |
| US5687064A | Rigidized outer support structure for an integrated circuit card | Electricity | 13 | Expired |
| US6011816A | Direct demodulation method and apparatus | Electricity | 13 | Expired |
| US5568364A | Sonically-bonded outer support structure for an integrated circuit card | Electricity | 10 | Expired |
| US6107967A | Billboard antenna | Electricity | 9 | Expired |
| USD388059S | Pager | General | 6 | Expired |
| USD415762S | Pager | General | 4 | Expired |
| USD410926S | Pager | General | 1 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.