US5795161A
Expired / Lapsed
US
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Apparatus and method for calculating an absolute time at which an event occurred
Assignee: Individual
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Filing: 1995-06-07
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Granted: 1998-08-18
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Expires: 2015-06-07
Abstract
Abstract An event logging system in which logged events are time stamped by storing a value read from a counter which is incremented at an arbitrary but consistent rate. When the data is recalled for analysis, the actual time of the event is calculated by reading the current value of the counter, reading the stored counter values associated with logged events, measuring the period of the clock incrementing the counter, and then using this information to calculate the absolute time.
Inventors
- 👤 Peter S. Vogel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 02:55
CPC Classifications
G; G07; G07C; G07C1/00; A; A63; A63F; A63F13/00; A63F13/40; A63F13/44; A63F13/45; A63F13/80; A63F13/843; G07C13/00; A63F2300/00; A63F2300/40; A63F2300/401; A63F2300/50; A63F2300/53; A63F2300/532; A63F2300/60; A63F2300/63; A63F2300/638
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
183 words
A method of calculating the absolute time at which an event occurred using a calculating device, comprising the steps of: i) outputting a signal indicative of a number of elapsed time units by a timer, said number of elapsed time units being incremented based on a periodic signal; ii) receiving a first value representing a number of said time units output from said timer at a time at which the event occurred; iii) receiving a second value representing a number of said time units output from said timer at a time when a method of calculating a absolute time at which an event occurred is performed; iv) subtracting said first value from said second value to give a third value; v) receiving said periodic signal representative of a period of said time units; vi) measuring an absolute time period of said periodic signal to determine a clock period of said time units; vii) multiplying said third value by said clock period to determine an absolute elapsed time; and viii)subtracting said absolute elapsed time from a current time to yield an absolute event time.
Claim 2
Independent Claim
183 words
A method of calculating the absolute time at which an event occurred using a calculating device, comprising the steps of: i) outputting a signal indicative of a number of elapsed time units by a timer, said number of elapsed time units being incremented based on a periodic signal; ii) receiving a first value representing a number of said time units output from said timer at a time at which the event occurred; iii) receiving a second value representing a number of said time units output from said timer at a time when a method of calculating a absolute time at which an event occurred is performed; iv) subtracting said first value from said second value to give a third value; v) receiving said periodic signal representative of a period of said time units; vi) measuring an absolute time period of said periodic signal to determine a clock period of said time units; vii) multiplying said third value by said clock period to determine an absolute elapsed time; and viii)subtracting said absolute elapsed time from a current time to yield an absolute event time.
Claim 3
Dependent Claim
181 words
Apparatus for calculating the absolute time at which an event occurred, comprising: a timer for outputting a signal indicative of a number of elapsed time units, said number of elapsed time units being incremented based on a periodic signal; and a calculator adapted to: i) receive a first value representing a number of time units output from said timer at a time at which the event occurred; ii) receive a second value representing the number of said time units output from said timer at a time when a calculation to determine an absolute time at which an event occurred is performed; iii) subtract said first value from said second value to give a third value; iv) receive said periodic signal representative of a period of said time units; v) measure an absolute time period of said periodic signal to determine a clock period of said time units; vi) multiply said third value by said clock period to determine an absolute elapsed time value; and vii) subtract said absolute elapsed time value from a current time to yield an absolute event time.
Claim 4
Dependent Claim
181 words
Apparatus for calculating the absolute time at which an event occurred, comprising: a timer for outputting a signal indicative of a number of elapsed time units, said number of elapsed time units being incremented based on a periodic signal; and a calculator adapted to: i) receive a first value representing a number of time units output from said timer at a time at which the event occurred; ii) receive a second value representing the number of said time units output from said timer at a time when a calculation to determine an absolute time at which an event occurred is performed; iii) subtract said first value from said second value to give a third value; iv) receive said periodic signal representative of a period of said time units; v) measure an absolute time period of said periodic signal to determine a clock period of said time units; vi) multiply said third value by said clock period to determine an absolute elapsed time value; and vii) subtract said absolute elapsed time value from a current time to yield an absolute event time.
References Cited (Backward Citations)
US3771240A
Cited
US3718759A
Cited
US3934226A
Cited
US4122498A
Cited
US4121355A
Cited
EP0010794B1
Cited
US4377870A
Cited
US4518361A
Cited
JPS5986341A
Cited
US4651299A
Cited
GB2148675A
Cited
WO1986002753A1
Cited
WO1986007277A1
Cited
GB2184029A
Cited
US4745468A
Cited
US4926255A
Cited
US4745468B1
Cited
WO1990004439A1
Cited
US5211564A
Cited
US5033969A
Cited
US5176520A
Cited
US5273437A
Cited
US5294229A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 2001-08-17 | 2002-02-16 | 2002-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-08-17 | 2006-02-16 | 2006-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-08-17 | 2010-02-16 | 2010-08-18 | $7700.00 | Window Closed / Lapsed |