发明名称 |
Location device with a gravity measuring device |
摘要 |
A location device has a gravity measurement instrument in communication with a database which has the locations relative to time of an astronomical object. The location device also has a timepiece indicating the time which may be used to determine the location of the astronomical object. |
申请公布号 |
US8140259(B2) |
申请公布日期 |
2012.03.20 |
申请号 |
US20100846647 |
申请日期 |
2010.07.29 |
申请人 |
HALL DAVID R.;LUNDGREEN DAVID;DURRAND CHRISTOPHER;SCHWARTZ MARK A.;SCHLUMBERGER TECHNOLOGY CORPORATION |
发明人 |
HALL DAVID R.;LUNDGREEN DAVID;DURRAND CHRISTOPHER;SCHWARTZ MARK A. |
分类号 |
G01C21/00;E21B25/16;E21C25/10 |
主分类号 |
G01C21/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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