FR2191368A1 - - Google Patents
Info
- Publication number
- FR2191368A1 FR2191368A1 FR7223217A FR7223217A FR2191368A1 FR 2191368 A1 FR2191368 A1 FR 2191368A1 FR 7223217 A FR7223217 A FR 7223217A FR 7223217 A FR7223217 A FR 7223217A FR 2191368 A1 FR2191368 A1 FR 2191368A1
- Authority
- FR
- France
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B11/00—Transmission systems employing sonic, ultrasonic or infrasonic waves
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S1/00—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith
- G01S1/72—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using ultrasonic, sonic or infrasonic waves
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Signal Processing (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7223217A FR2191368B1 (US20110009641A1-20110113-C00185.png) | 1972-06-27 | 1972-06-27 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7223217A FR2191368B1 (US20110009641A1-20110113-C00185.png) | 1972-06-27 | 1972-06-27 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2191368A1 true FR2191368A1 (US20110009641A1-20110113-C00185.png) | 1974-02-01 |
| FR2191368B1 FR2191368B1 (US20110009641A1-20110113-C00185.png) | 1975-03-07 |
Family
ID=9100910
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR7223217A Expired FR2191368B1 (US20110009641A1-20110113-C00185.png) | 1972-06-27 | 1972-06-27 |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR2191368B1 (US20110009641A1-20110113-C00185.png) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE519086A (US20110009641A1-20110113-C00185.png) * | 1951-05-12 | |||
| US2768246A (en) * | 1951-05-12 | 1956-10-23 | Charles Legorju | Electrical transducer |
-
1972
- 1972-06-27 FR FR7223217A patent/FR2191368B1/fr not_active Expired
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE519086A (US20110009641A1-20110113-C00185.png) * | 1951-05-12 | |||
| US2768246A (en) * | 1951-05-12 | 1956-10-23 | Charles Legorju | Electrical transducer |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2191368B1 (US20110009641A1-20110113-C00185.png) | 1975-03-07 |
Similar Documents
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse |