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| Number | Title | Issue Date |
| 8427907 | Clock device and computer-readable record medium storing program for implementing the same A clock device acquires time information representing present time from an external device at preset time intervals, corrects time of an internal clock based on the time information, calculates an error of the time of the internal clock based on the present time rep... | 04/23/2013 |
| 8395969 | Virtual real-time clock based on time information from multiple communication systems Method and apparatus to implement a “virtual” real-time clock at a terminal based on time information from multiple communication systems. At least one system (e.g., GPS) provides “absolute” time information for the virtual real-time clock, and at least one ... | 03/12/2013 |
| 8391105 | Synchronization of a generated clock A real time clock circuit is provided that has an onboard oscillator continuously providing an internal clock frequency, which is digitally synchronized to a more accurate reference clock frequency. An exemplary real time clock inhibits synchronization of the intern... | 03/05/2013 |
| 8385156 | Radio-controlled adjustment timepiece A start date and an end date of a daylight saving time input by a user is stored in the daylight saving time information storage unit (41). The radio-controlled adjustment section (20) generates a time to adjust the time which the clocking unit (10 | 02/26/2013 |
| 8369186 | System and method of increasing battery life of a timekeeping device Methods and systems of extending battery life of remote battery-operated timekeeping devices by minimizing the number of required synchronizations per unit of time needed to maintain a predetermined accuracy of the devices. The number of synchronizations are minimiz... | 02/05/2013 |
| 8169856 | Time synchronization in cluster systems Techniques are described herein for synchronizing cluster time. According to one technique, a master node is appointed in a cluster. Other “slave” nodes periodically synchronize their clocks with the master node. To synchronize its clock with the master node, a ... | 05/01/2012 |
| 8000172 | Time control apparatus and method of managing time within said time control apparatus A time control apparatus, which is not equipped with an auxiliary batter for real time control, includes a time information memory for storing real time information updated for a user; and a real time controller, in response to powering on, if the real time informat... | 08/16/2011 |
| 7983115 | System and method for managing time in automatic control equipment A time management system that includes a first clock having a first counter operating on a first timebase, a second clock having a second counter operating on a second timebase identical to the first timebase and a third counter operating on a third timebase less th... | 07/19/2011 |
| 7796474 | Clock diagnostics Disclosed is a clock for use in a master/slave clock system, including a system and method for semi-automatically performing diagnostic self-tests on the status and operability of a plurality of components of one or more secondary clocks. The invention addresses a m... | 09/14/2010 |
| 7796473 | Clock diagnostics Disclosed is a clock for use in a master/slave clock system, including a system and method for semi-automatically performing diagnostic self-tests on the status and operability of a plurality of components of one or more secondary clocks. The invention addresses a m... | 09/14/2010 |
| 7656751 | Step time change compensation in an industrial automation network One or more embodiments provide Common Industrial Protocol (CIP) based time synchronization systems and methods. The CIP Sync solution can be part of Ethernet/IP and can be based on standard UDP (User Datagram Protocol) and/or IEEE 1588 (Time Synchronization) Ethern... | 02/02/2010 |
| 7532547 | Clock diagnostics Disclosed is a clock for use in a master/slave clock system, including a system and method for semi-automatically performing diagnostic self-tests on the status and operability of a plurality of components of one or more secondary clocks. The invention addresses a m... | 05/12/2009 |
| 7522477 | Multi-event timer device A multiple-event timer device for timing various infant-related biological functions such as diaper changes, feeding and sleeping is described herein. The timer device has a plurality of digital timers corresponding to a plurality of displays and a plurality of butt... | 04/21/2009 |
| 7433273 | Electronic timepiece with wireless information function An electronic timepiece with wireless information function that is small, has good reception performance, and has a construction that improves the freedom of design. Antennae 5A and 5B are disposed inside a short cylindrically-shaped metal case 1 | 10/07/2008 |
| 7426156 | Method and apparatus for clock synchronization that accounts for curvature in the space-time continuum Methods and apparatuses for applying a correction that accounts for curvature in the space-time continuum in the context of clock synchronization are disclosed. A representative apparatus, among others, includes a memory having a curved space-time correction module ... | 09/16/2008 |
| 7411868 | Estimation of time within untrusted time device disconnected from trusted time device Upon connecting to a trusted device, an untrusted device: (a) acquires a trusted current time; (b) stores an elapsed time; (c) determines an estimated current time; and, (d) stores a time difference between the estimated current time and an untrusted current time. T... | 08/12/2008 |
| 7411869 | Wireless synchronous time system A method of synchronizing an event system. The method includes receiving a first signal at a primary device, where the first signal includes a time component, and processing the first signal to produce a second signal, where the second signal includes the time compo... | 08/12/2008 |
| 7411867 | Stable composite clock Apparatus and method for producing a composite clock signal with optimized stability characteristics from individual clocks which have different stabilities or variances. The composite clock signal includes weighted individual clock signals. In a first (PPN) case, a... | 08/12/2008 |
| 7394726 | Time keeping system with automatic daylight savings time adjustment A time keeping system having a first time module operable to keep a first time, a second time module operable to keep a second time, and a control module operatively coupled to the first time module and to the second time module. The control module adjusts the first... | 07/01/2008 |
| 7385878 | Local time adjusting method of mobile communication terminal A local time adjusting method of a mobile communication terminal includes extending 6-bit local time offset contained in a sync channel message transmitted from a base station to a 7-bit local time offset to calculate an actual local time offset in a corresponding a... | 06/10/2008 |
| 7382694 | Methods to resolve TSF timer ambiguity of IEEE 802.11e schedule element A plurality of methods, computer program product, and apparatus that use a lower 32 bit field of a 64-bit 802.11 TSF timer, so as to encode the reference time instant without the ambiguity as to whether there the reference time is referring to a future time or a pas... | 06/03/2008 |
| 7372779 | Radio controlled timepiece and method of controlling the same The invention is directed to obtaining a radio controlled timepiece that, in a case when the user who uses it moves from one country or one region to another where the time difference is different, has simplified an operation of correcting the time difference betwee... | 05/13/2008 |
| 7372846 | Method for transmitting time information via a data packet network Time information which is to be transmitted via a data packet network is called up from a time information source and is transmitted to a data packet transmission module. The data packet transmission module controls the transmission time of a data packet in which th... | 05/13/2008 |
| 7369462 | Wireless synchronous time system with solar powered transceiver A primary device for a synchronous event system. In one construction, the primary device includes a solar panel operable to convert light into electricity; a receiver operable to receive a global positioning system time signal; a processor coupled to the receiver an... | 05/06/2008 |
| 7356603 | Integrated system of loads with multiple public awareness functions A signaling system may include two subsystems that share a common wiring backbone and provide public awareness functions. The two subsystems may be a public address system and a master/slave clock system. Remote rooms at the tail end of the wiring backbone include a... | 04/08/2008 |
| 7356725 | Method and apparatus for adjusting a time of day clock without adjusting the stepping rate of an oscillator A system, method and computer program product for steering a time-of-day (TOD) clock for a computer system having a physical clock providing a time base for executing operations that is stepped to a common oscillator. The method includes computing a TOD-clock offset... | 04/08/2008 |
| 7340630 | Multiprocessor system with interactive synchronization of local clocks A multiprocessor computer system comprises multiple data processors, each with an internal clock for providing time stamps to application software. The processors take turns as synchronization masters. The present master transmits a “request” time stamp (indicat... | 03/04/2008 |
| 7330488 | System, method, and article of manufacture for synchronizing time of day clocks on first and second computers A system, method, and article of manufacture for synchronizing first and second time-of-day clocks on first and second computers, respectively, are provided. The first and second computers have first and second network interface cards with third and fourth clocks, r... | 02/12/2008 |
| 7330174 | Method and apparatus for a programmable electrophoretic remote control A programmable remote control unit including a data processing device, a memory storage unit, a data transmitter, an electrophoretic button, and a bus that communicatively couples the data processing device to the memory storage unit, the data transmitter, and the e... | 02/12/2008 |
| 7327699 | Method and device for synchronisation of distant clocks to a central clock via satellite The invention relates to a method and a device for synchronizing one or more remote clocks (2) to a central clock (1) via a bi-directional satellite radio link (9.1, 9.2). Time and data signals are exchanged via suitable transmitting (8, 12 | 02/05/2008 |
| 7283567 | Network delay identification method and apparatus Network delay is determined in order to synchronize a clock in a mobile station with a reference clock. Tones are generated that represent a sequence of bits in a synchronization flag. The tones are sampled beginning at a selected sample start time. The sampled tone... | 10/16/2007 |
| 7280565 | Synchronous clocked communication system with decentralized input/output modules and method for linking decentralized input/output modules into such a system The invention relates to a synchronous clocked communication system, for example a distributed automation system, the stations of which can be arbitrary automation components and which are coupled to one another via a data network. Using the disclosed method for int... | 10/09/2007 |
| 7281061 | Time managing apparatus for managing time to synchronize with other apparatuses A time managing apparatus that manages times clocked by a plurality of timer modules in apparatuses connected to each other on a network. The time managing apparatus has: a holding means for holding event start time information that indicates an event start time at ... | 10/09/2007 |
| 7266048 | Digital time clock for operation in conjunction with mechanical time clock A digital time clock that may be used in conjunction with a mechanical time clock. The digital time clock is placed on or adjacent to an existing mechanical time clock. A radio frequency identification (RFID) tag is associated with each time card that is distributed... | 09/04/2007 |
| 7263036 | Time correction system in cluster system Provided is a time correction system which includes a means for performing time correction of time in an operational system device by obtaining standard time information from outside with the operational system device among the devices in the cluster to be a represe... | 08/28/2007 |
| 7251199 | Distributed system time synchronization including a timing signal path A distributed system with a timing signal path for increased precision in time synchronization among distributed system clocks. A distributed system according to the present teachings includes a master clock coupled to a timing signal path and a set of slave clocks ... | 07/31/2007 |
| 7239581 | Systems and methods for synchronizing the internal clocks of a plurality of processor modules In a multiprocessor system that includes a plurality of processor modules, each one of which includes its own internal clock, one of the plurality of processor modules is designated as a master processor module having a master internal clock. Each other processor mo... | 07/03/2007 |
| 7239626 | System clock synchronization in an ad hoc and infrastructure wireless networks A method of synchronizing clocks in the stations of ad hoc and infrastructure networks includes providing a time stamp field in a header; reading the header by all stations in a network; extracting the time stamp information from the header by each station in the ne... | 07/03/2007 |
| 7230884 | Clock diagnostics Disclosed is a clock for use in a master/slave clock system, including a system and method for semi-automatically performing diagnostic self-tests on the status and operability of a plurality of components of one or more secondary clocks. The invention addresses a m... | 06/12/2007 |
| 7212468 | Master/slave clock system with automatic protocol detection and selection Disclosed is a method for automatically detecting and selecting a time correction protocol and a time base, from among many possible protocols, in a master/slave clock system. A “self-teaching” feature is also disclosed, which includes a table stored at the slav... | 05/01/2007 |
