| Patents for G01C 5 - Measuring height; Measuring distances transverse to line of sight; Levelling between separated points; Surveyors' levels (3,586) |
|---|
| 07/31/1991 | EP0439255A1 Electronic apparatus with depth meter |
| 07/16/1991 | US5032014 Datum beam projecting apparatus for use with surveying equipment |
| 07/09/1991 | US5031160 Small-sized electronic device with depth gauge |
| 06/27/1991 | WO1991009272A1 Hydrostatic plumber's level |
| 06/19/1991 | CA2030030A1 Hydro-pneumatic level |
| 06/12/1991 | EP0432077A1 Electronic or other device for adjusting, plotting or checking a level or determined faulty level |
| 05/21/1991 | US5016473 Altimeter |
| 05/15/1991 | EP0427662A2 Hypsometer with controlled heating specially for use in meteorologic radio-sondes |
| 05/08/1991 | EP0426287A1 Improved detection and display device |
| 04/30/1991 | US5010768 Device for multimeasurement of vertical position variation and a level-setting system equipped with said device |
| 04/24/1991 | EP0313589B1 Stabilization control circuit for vertical position in an inertial navigator |
| 04/17/1991 | EP0233941A4 Ground proximity warning system for use with aircraft having degraded performance |
| 03/26/1991 | US5001929 Electronic altimeter |
| 03/26/1991 | US5001926 Device for determining the vertical distance between two elements at unequal heights |
| 03/20/1991 | EP0269655A4 Warning system for tactical aircraft |
| 03/19/1991 | US5001476 Warning system for tactical aircraft |
| 03/07/1991 | WO1991002944A1 Electronic altimeter |
| 02/20/1991 | EP0413142A2 Altimeter |
| 02/20/1991 | EP0190345B1 Ground proximity warning system for use with aircraft having degraded performance |
| 02/12/1991 | US4991302 Open circuit leveling measuring system |
| 02/06/1991 | CN2070898U Multifunctional tree measurer |
| 01/30/1991 | CN2070433U Falling gradient, height difference measuring rule |
| 01/22/1991 | US4987413 Aircraft terrain warning system with configuration modified warning and improved mode switching |
| 01/08/1991 | US4983832 Scanning electron microscope |
| 12/26/1990 | CN2068226U Height indicator reading tray |
| 12/25/1990 | US4980684 Warning system for tactical rotary wing aircraft |
| 12/11/1990 | US4976538 Detection and display device |
| 11/27/1990 | US4972596 Trailer measuring system |
| 11/13/1990 | US4969358 Electronic altimeter/barometer |
| 11/01/1990 | WO1990013002A1 Device for defining a horizontal plane |
| 10/10/1990 | EP0391498A1 A system of "Computer Aided Surveying" for obtaining digital, 3D topograpic information |
| 09/26/1990 | CN1045647A Engineering measurement method and device for inclined surface |
| 09/04/1990 | CA1273486A1 Self leveling transmitter for laser alignment systems |
| 08/22/1990 | CN2060873U Level scale for long distance |
| 08/21/1990 | US4951047 Negative climb after take-off warning system |
| 07/24/1990 | US4943158 Sensor controlled leveling device |
| 07/03/1990 | US4939513 System for alerting a pilot of a dangerous flight profile during low level maneuvering |
| 07/03/1990 | US4938062 Barometric meter |
| 06/12/1990 | US4932248 Method and device for measuring vertical movements in the absence of a fixed reference point |
| 05/15/1990 | US4926042 Method of and device for detecting light receiving position utilizing optical fibers |
| 05/02/1990 | EP0366150A1 Datum beam projecting apparatus for use with surveying equipment |
| 05/02/1990 | CN2056746U Simple adjustable two-purpose ruler |
| 05/01/1990 | US4922258 Method for determining aircraft flight altitude |
| 04/10/1990 | US4916447 Warning system for aircraft landing with landing gear up |
| 03/21/1990 | CN1007293B Positioning and message-transfering system employing satellites and stored topographic map |
| 02/20/1990 | CA1265923A1 Laser alignment system with modulated field |
| 01/23/1990 | US4894924 Method for measuring level of large structure |
| 01/18/1990 | DE3916385A1 Method and arrangement for geometrical height measurement |
| 12/27/1989 | CN2050155U Height indicator |
| 12/13/1989 | EP0345929A1 A device for measuring altitude and barometric pressure |
| 12/06/1989 | EP0344412A1 Process and device for the continuous measuring of the relative height of a long object driven into the earth |
| 11/21/1989 | US4882697 Stabilization control circuit for vertical position in an inertial navigator |
| 11/07/1989 | US4878297 Hydrostatic level and elevation measuring device |
| 11/02/1989 | WO1989010536A1 Level |
| 11/01/1989 | CN2047006U Theodolite capable of surveying indined plane |
| 10/19/1989 | WO1989009924A1 Method and apparatus for measuring distance travelled along a gradient |
| 09/27/1989 | CN1035889A Spirit level with an unchanged air bubble |
| 09/26/1989 | US4869590 Geodetic instrument |
| 08/15/1989 | US4857923 Ground proximity warning system for an excessive descent rate over undulating terrain |
| 08/08/1989 | US4854704 Optical automatic levelling apparatus |
| 07/26/1989 | EP0325196A1 Device for measuring the altitude distance travelled by a road vehicle, particularly a bicycle |
| 07/18/1989 | US4849756 Ground proximity warning system terrain classification system |
| 07/13/1989 | DE3833778A1 Arrangement for level measurement, especially for geometric levelling |
| 06/27/1989 | CA1256564A1 Warning system for tactical aircraft |
| 06/22/1989 | DE3742001A1 Flexible tube level |
| 05/30/1989 | US4835716 Compact measuring apparatus capable of measuring two different data with a single pressure sensor |
| 05/24/1989 | CN1033102A Method for measuring difference in elevation and its equipment |
| 05/23/1989 | CA1254657A1 Ground proximity warning system for use with aircraft having degraded performance |
| 05/11/1989 | DE3736643A1 Barometric altitude measurement taking into consideration the air temperature |
| 05/09/1989 | US4828382 Passive radio altimeter |
| 05/03/1989 | EP0313589A1 Stabilization control circuit for vertical position in an inertial navigator. |
| 04/25/1989 | CA1253251A1 Three-dimensional range camera |
| 04/19/1989 | EP0312332A2 Barometric meter |
| 04/06/1989 | WO1989003018A1 Device for measuring the vertical variation of position |
| 04/06/1989 | DE3732100A1 Electronic altograph (altitude recorder) |
| 04/05/1989 | EP0310491A1 Device for measuring vertical position variation and system for levelling including such a device |
| 04/04/1989 | US4818992 Excessive altitude loss after take-off warning system for rotary wing aircraft |
| 03/29/1989 | EP0308522A1 Solid state accumulating altimeter |
| 03/02/1989 | DE3727465A1 Tube level with hydraulic building level template |
| 02/01/1989 | CN2031913U Electronic measuring apparatus for railroad gauge level |
| 01/18/1989 | CN1030474A Multipurpose level |
| 01/04/1989 | EP0297601A2 Self leveling transmitter for laser alignment systems |
| 01/03/1989 | US4794803 For amplifying a differential signal |
| 01/03/1989 | US4794704 Height level measuring device |
| 12/21/1988 | CN88204190U Level trier |
| 12/21/1988 | CN88201288U Adjustable bridge plate for flatness measuring |
| 12/20/1988 | US4792906 Navigational apparatus and methods for displaying aircraft position with respect to a selected vertical flight path profile |
| 12/20/1988 | US4792799 Aircraft terrain closure warning system with descent rate based envelope modification |
| 12/07/1988 | CN88203902U Pocket height indicator |
| 12/07/1988 | CN87216272U Amendment hollow box gas-pressure altitude indicator |
| 11/09/1988 | EP0290140A2 Equipment for measuring differences in elevation |
| 11/08/1988 | US4783772 Wristwatch with pressure sensor |
| 10/26/1988 | CN88102187A Stabilization control circuit for vertical position in an inertial navigator |
| 10/26/1988 | CN87215010U Wheel type digital level distance and altitude difference measuring and recording instrument |
| 10/25/1988 | US4779461 Method of and apparatus for measuring and recording the drop height of a container in transit |
| 10/20/1988 | WO1988008118A1 Stabilization control circuit for vertical position in an inertial navigator |
| 10/18/1988 | CA1243405A1 Configuration responsive descent rate warning system for aircraft |
| 10/11/1988 | CA1243119A1 Aircraft terrain warning system with configuration modified warning and improved mode switching |
| 10/11/1988 | CA1243118A1 Aircraft terrain closure warning system with descent rate based envelope modification |
| 10/11/1988 | CA1243117A1 Altitude loss after take-off warning system utilizing time and altitude |