Did You Know...
...that after Walter Hunt patented the safety pin in 1849, he sold the rights to it for $400?
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 4682354 | Automatic call coverage for unattended PBX stations An automatic call coverage feature arrangement for unattended PBX stations including attendant consoles. When an incoming call is received at an unattended station, a control processor monitors the number of ring cycles at the called station. The control ... | 07/21/1987 |
| 4680786 | Communication system for providing business communication features to cellular mobile telecommunication customers The subject communication system is an improved cellular mobile telecommunication system which provides business communication features to cellular mobile telecommunication customers. This is accomplished by using a business communication system as the switch ... | 07/14/1987 |
| 4677616 | Flow control scheme for a switching network A flow control mechanism for a packet switching system that provides for the continuous dynamic control of station window size beginning with call setup and extending through the duration of the call. A station window size can be of a first magnitude at c... | 06/30/1987 |
| 4672654 | PBX security system for monitoring security guard tours A security system arrangement utilizing a standard PBX for monitoring a plurality of concurrently administrable guard tours. A control processor of the PBX administers the security monitoring processing operation. This processing operation monitors the ac... | 06/09/1987 |
| 4661974 | Automatic route selection of a private telephone network path on the basis of a public telephone network number A data structure and program routines for use in a private branch exchange telephone system (PBX) for automatically routing calls via a private telephone network in response to a dialed public telephone network number and for restricting outgoing calls fr... | 04/28/1987 |
| 4656627 | Multiphase packet switching system A packet switching system having separate arbitration and data buses together with circuitry for dividing the buses into a plurality of time segments termed phases. The plurality of phases permit a like plurality of separate arbitration operations and a l... | 04/07/1987 |
| 4653085 | Telephone switching system adjunct call processing arrangement The adjunct call processing arrangement of our invention eliminates the separation between hard-wired telephone switching system computer facilities and customer owned switchably connectable computer facilities. A general purpose communication interface i... | 03/24/1987 |
| 4651103 | Phase adjustment system Synchronization facilities are disclosed for maintaining error free timing of a digital system when control of the system timing is switched between a plurality of clock sources. The signal of each source is applied to an associated counter divider whose ... | 03/17/1987 |
| 4646346 | Integrated message service system This integrated message service system provides a user with an indication of which of a plurality of message service systems contain unretrieved messages. This is accomplished by the serving telephone switching system maintaining a translation memory that... | 02/24/1987 |
| 4644562 | Combined cross polarization interference cancellation and intersymbol interference equalization for terrestrial digital radio systems Data-aided equalization and cancellation in digital data transmission over dually polarized fading radio channels is disclosed. The present invention uses decision feedback structures with finite-tap transversal filters. Subject to the assumption that som... | 02/17/1987 |
