Patent US3817620A successfully refreshed from Google Patents.
US3817620A
Expired / Lapsed
US
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Method of geodetic measurement using diffusion type pulse laser
Assignee: Hitachi Ltd
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Filing: 1972-10-16
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Granted: 1974-06-18
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Expires: 1992-10-16
Abstract
Abstract Pulsed laser light is emitted at a certain interval and diffused in space by a pulse laser source installed on a flying object moving relative to the ground. The diffused laser light is received on the ground at a plurality of known points whose coordinates are all known and at, at least, one unknown point whose coordinates are to be determined so that the position of the flying object and the coordinates of the unknown point are determined by detecting the times of emission and reception of the laser pulse.
Inventors
- 👤 A Tachibana
- 👤 Y Suzaki
- 👤 Y Yamamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:00
CPC Classifications
G; G01; G01S; G01S5/00; G01S5/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
A geodetic method wherein pulsed laser light is emitted at a certain interval and diffused in space by a pulse laser source installed on a flying object moving relative to the ground, the diffused pulsed laser light is received on the ground at a plurality of known points whose coordinates are all known and at one or more unknown points whose coordinates are unknown and to be determined, and the position of the flying object and the coordinates of the unknown points are determined by detecting the times of emission and detection of the laser pulse.
Claim 2
Dependent Claim
96 words
A geodetic method wherein pulsed laser light is emitted at a certain interval and diffused in space by a pulse laser source installed on a flying object moving relative to the ground, the diffused pulsed laser light is received on the ground at a plurality of known points whose coordinates are all known and at one or more unknown points whose coordinates are unknown and to be determined, and the position of the flying object and the coordinates of the unknown points are determined by detecting the times of emission and detection of the laser pulse.
References Cited (Backward Citations)
US2972742A
Cited
US3352223A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-17 | 1977-12-17 | 1978-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-17 | 1981-12-17 | 1982-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-17 | 1985-12-17 | 1986-06-18 | $7700.00 | Window Closed / Lapsed |