WO2018027294A1 - Unsinkable pin used as a survival compass - Google Patents

Unsinkable pin used as a survival compass Download PDF

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Publication number
WO2018027294A1
WO2018027294A1 PCT/CA2017/000177 CA2017000177W WO2018027294A1 WO 2018027294 A1 WO2018027294 A1 WO 2018027294A1 CA 2017000177 W CA2017000177 W CA 2017000177W WO 2018027294 A1 WO2018027294 A1 WO 2018027294A1
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WO
WIPO (PCT)
Prior art keywords
pin
compass
survival
unsinkable
portable
Prior art date
Application number
PCT/CA2017/000177
Other languages
French (fr)
Inventor
Steeve Bonneau
Nathalie Morneau
Original Assignee
Steeve Bonneau
Nathalie Morneau
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Steeve Bonneau, Nathalie Morneau filed Critical Steeve Bonneau
Publication of WO2018027294A1 publication Critical patent/WO2018027294A1/en

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C17/00—Compasses; Devices for ascertaining true or magnetic north for navigation or surveying purposes
    • G01C17/02—Magnetic compasses
    • G01C17/04—Magnetic compasses with north-seeking magnetic elements, e.g. needles
    • G01C17/06—Suspending magnetic elements
    • G01C17/08—Suspending magnetic elements by flotation
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C17/00—Compasses; Devices for ascertaining true or magnetic north for navigation or surveying purposes
    • G01C17/02—Magnetic compasses
    • G01C17/04—Magnetic compasses with north-seeking magnetic elements, e.g. needles
    • G01C17/20—Observing the compass card or needle

Definitions

  • the invention relates to the field of survival.
  • a pin is a "small metal rod pointed at one end and topped with a head at the other end, used to fix, to attach something". It is recognized that this pin, or a portion thereof, can be magnetized at one of its ends. To be magnetized, said pin, or a portion thereof, must consist of a ferromagnetic substance either; iron, nickel, cobalt, gadolinium or an alloy containing one or more of these metals.
  • a pin when placed on a liquid such as water, weighs its low weight, may float under certain conditions; it must be dry, deposited thoroughly and the liquid must be calm. However, it will sink as soon as one of these three conditions is not respected.
  • a pin may be magnetized at one of its ends and float on a liquid such as water, under the three conditions mentioned above. Consequently, it will have the quality of magnetic compass indicating the North-South magnetic axis terrestrial, as long as the three conditions are respected, otherwise it will flow and will be useless like compass of survival.
  • this container if a container is required for launching, this container must be non-ferromagnetic and be large enough to allow the pin to rotate freely on itself.
  • the covering of said pin can be said plastic or any similar material of density less than one. allowing the said case or said sheath to float and therefore to be unsinkable.
  • the pin or a portion thereof, in its floating case or in its floating sheath can be transported without risk to the user to injure himself.
  • the pin, or a portion of it, in its floating case or in its floating sheath can be named: The unsinkable pin survival compass.
  • the unsinkable survival compass pin Once launched, without special precaution, the unsinkable survival compass pin, goes back to the surface of the liquid and then positions itself in the North-South Magnetic Earth axis, turning on itself on the surface of the liquid, as long as the container is non-ferromagnetic and sufficiently large.
  • the magnetic end of the unsinkable survival compass pin will point the South in every point on the planet Earth.
  • the other non-magnetized end will indicate the North in every point on the planet Earth and can be such a tip at this end and identified with an "N", to facilitate the reading and the identification of the North point.
  • the plastic of the unsinkable survival compass pin can be luminescent glow-in-the-dark, allowing nighttime use.
  • the insubmersible survival pin by its small size, avoids carrying a standard compass on oneself and will always be useful when the technology (gps, cellular, 7) is stalled. Said pin is new and unique because insubmersible, moreover it is practical for its smallness and its small weight, can be stored everywhere, so easily transportable. Detailed description:
  • This pin, Fig. 1 (1), or a portion thereof 2 (1), FIG. 3 (1) must be made of a ferromagnetic substance either; iron, nickel, cobalt, gadolinium or an alloy containing one or more of these metals.
  • the pin Fig. 1 (1), or a portion thereof 2 (1), FIG. 3 (1), magnetized 1 (2), FIG. 2 (2), FIG. 3 (2) at one of its ends is introduced by molding or by drilling into a case Fig.
  • FIG. 3 (3) or said sleeve FIG. 1 (3), FIG. 2 (3), FIG. 3 (3) made of floating material such as plastic, or any similar material, having the ability to float (density less than one), therefore unsinkable.
  • the pin Fig. 1 (1), or a portion thereof 2 (1), FIG. 3 (1), in its floating case Fig. 1 (3), FIG. 2 (3), FIG. 3 (3) or in its floating sheath Fig. 1 (3), FIG. 2 (3), FIG. 3 (3) can be named:
  • the unsinkable pin survival compass Fig. 1, Fig. 2, Fig.3 can be made of plastic Fig. 1 (3), FIG. 2 (3), FIG. 3 (3) glow-in-the-dark luminescent for night use.
  • the unsinkable pin survival compass Fig. 1, FIG. 2, Fig.3, must be put on or in a liquid, such as water.
  • said pin Fig. 1, FIG. 2, Fig.3 must have sufficient space and a non-ferromagnetic container to allow it to rotate freely on itself and indicate the Earth's magnetic North at any point on the planet Earth.
  • the unsinkable pin survival compass Fig. 1, FIG. 2, Fig.3 because of its small size, avoids carrying a standard compass and will always be useful when the technology (GPS, cellular, ...) is stalled.
  • Said pin 1, FIG. 2, Fig.3 is new and unique because insubmersible, in addition it is practical for its smallness and its small weight, can be stored everywhere, so easily transportable.
  • the insubmersible pin survival compass is a very small object that can be introduced everywhere, avoiding having a standard compass on you. Once placed in a liquid such as water, the pin indicates the Earth's magnetic North everywhere on the Earth. Said pin is new and unique because insubmersible, moreover it is practical for its smallness and its small weight, can be stored everywhere, so easily transportable.

Landscapes

  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Adornments (AREA)
  • Toys (AREA)

Abstract

A device for finding one's bearings, such as a compass, in a survival situation. The device consists of a pin or a portion of same, such as a ferromagnetic metal rod, magnetised at one of the ends thereof, introduced by moulding or by piercing into a floating material of relative density less than one, such as plastic, thus constituting a floating sheath or a floating sleeve for the pin. The plastic coating the pin can be luminescent for use at night. The pin is novel and unique because it is unsinkable. The pin is practical due to its smallness and very low weight, being storable anywhere, and therefore easily transportable. The unsinkable survival compass pin rotates on itself in a liquid such as water, in order to indicate the terrestrial magnetic North-South axis at any point on the Earth. The pin can always be used to find ones bearings, especially when technology is in a dead spot (gps, mobile phone, etc.).

Description

Titre :  Title:
ÉPINGLE INSUBMERSIBLE SERVANT DE BOUSSOLE DE SURVIE  INSUBMERSIBLE PIN AS A SURVIVAL COMPASS
Domaine technique : Technical area :
L'invention concerne le domaine de la survie.  The invention relates to the field of survival.
Renseignements généraux : General Information :
Selon le Larousse, une épingle est une « petite tige métallique pointue à un bout et garnie d'une tête à l'autre bout, servant à fixer, à attacher quelque chose ». Il est reconnu que cette dite épingle, ou une portion de celle-ci, peut être aimantée à l'une de ses extrémités. Pour être aimantée, ladite épingle, ou une portion de celle-ci, doit se composer d'une substance ferromagnétique soit; du fer, du nickel, du cobalt, du gadolinium ou encore d'un alliage contenant un ou plusieurs de ces métaux. According to Larousse, a pin is a "small metal rod pointed at one end and topped with a head at the other end, used to fix, to attach something". It is recognized that this pin, or a portion thereof, can be magnetized at one of its ends. To be magnetized, said pin, or a portion thereof, must consist of a ferromagnetic substance either; iron, nickel, cobalt, gadolinium or an alloy containing one or more of these metals.
Il est reconnu qu'une épingle, ou une portion de celle-ci, lorsque mise sur un liquide tel de l'eau, de paît son faible poid, peut flotter selon certaines conditions; elle doit être sèche, déposée minutieusement et le liquide doit être calme. Cependant, elle coulera dès que l'une de ces trois conditions n'est pas respectée. It is recognized that a pin, or a portion of it, when placed on a liquid such as water, weighs its low weight, may float under certain conditions; it must be dry, deposited thoroughly and the liquid must be calm. However, it will sink as soon as one of these three conditions is not respected.
Il est reconnu qu'une épingle, ou une portion de celle-ci, peut être aimantée à l'une de ses extrémités et flotte sur un liquide tel de l'eau, aux trois conditions mentionnées précédemment. En conséquence, elle aura la qualité de boussole magnétique indiquant l'axe Nord-Sud magnétique terrestre, en autant que les trois conditions soient respectées, sinon elle coulera et sera inutile comme boussole de survie. De plus, si un contenant est nécessaire pour la mise à l'eau, ce contenant doit être non-ferromagnétique et être suffisamment grand pour permettre à l'épingle de tourner librement sur elle-même. Problèmes résolus : It is recognized that a pin, or a portion thereof, may be magnetized at one of its ends and float on a liquid such as water, under the three conditions mentioned above. Consequently, it will have the quality of magnetic compass indicating the North-South magnetic axis terrestrial, as long as the three conditions are respected, otherwise it will flow and will be useless like compass of survival. In addition, if a container is required for launching, this container must be non-ferromagnetic and be large enough to allow the pin to rotate freely on itself. Resolved issues:
C'est pour éviter que l'épingle, ou une portion de celle-ci, coule au fond du liquide, que celle- ci a été introduite par moulage ou par perçage, dans une matière flottante de densité inférieur à un tel du plastique flottant, devenant ainsi un étui flottant ou un fourreau flottant pour ladite épingle. Le recouvrement de ladite épingle pouvant être ledit plastique ou toute matière semblable de densité inférieur à un. permettant au dit étui ou au dit fourreau de flotter et donc d'être insubmersible. De plus, l'épingle ou une portion de cel le-ci, dans son étui flottant ou dans son fourreau flottant peut être transporté sans risque pour l'utilisateur de se blesser. This is to prevent the pin, or a portion thereof, sinks to the bottom of the liquid, it was introduced by molding or drilling, in a floating material of lower density than such floating plastic , thus becoming a floating case or a floating sheath for said pin. The covering of said pin can be said plastic or any similar material of density less than one. allowing the said case or said sheath to float and therefore to be unsinkable. In addition, the pin or a portion thereof, in its floating case or in its floating sheath can be transported without risk to the user to injure himself.
L'épingle, ou une portion de celle-ci, dans son étui flottant ou dans son fourreau flottant peut ainsi se nommer : L'épingle insubmersible boussole de survie. The pin, or a portion of it, in its floating case or in its floating sheath can be named: The unsinkable pin survival compass.
Une fois mise à l'eau, sans précaution spéciale, l'épingle insubmersible boussole de survie, remonte à la surface du liquide et ensuite se positionne dans l'axe Nord-Sud magnétique terrestre, en tournant sur elle-même à la surface du liquide, en autant que le contenant soit non-ferromagnétique et suffisamment grand. Once launched, without special precaution, the unsinkable survival compass pin, goes back to the surface of the liquid and then positions itself in the North-South Magnetic Earth axis, turning on itself on the surface of the liquid, as long as the container is non-ferromagnetic and sufficiently large.
L'extrémité aimantée de l'épingle insubmersible boussole de survie, indiquera le Sud en tout point sur la planète Terre. L'autre extrémité non aimantée, indiquera le Nord en tout point sur la planète Terre et peut être telle une pointe à cette extrémité et identifiée d'un « N », pour en faciliter la lecture et l'identification du point Nord. The magnetic end of the unsinkable survival compass pin, will point the South in every point on the planet Earth. The other non-magnetized end, will indicate the North in every point on the planet Earth and can be such a tip at this end and identified with an "N", to facilitate the reading and the identification of the North point.
Le plastique de l'épingle insubmersible boussole de survie pouvant être luminescent « glow- in-the-dark », permettant une utilisation nocturne. The plastic of the unsinkable survival compass pin can be luminescent glow-in-the-dark, allowing nighttime use.
L'épingle insubmersible de survie de par sa petite taille, évite de transporter une boussole standard sur soi et sera toujours utile lorsque la technologie (gps, cellulaire,...) se retrouve au point mort. Ladite épingle est nouvelle et unique parce qu'insubmersible, de plus elle est pratique de par sa petitesse et son poid infime, pouvant être ranger partout, donc facilement transportable. Description détaillée: The insubmersible survival pin by its small size, avoids carrying a standard compass on oneself and will always be useful when the technology (gps, cellular, ...) is stalled. Said pin is new and unique because insubmersible, moreover it is practical for its smallness and its small weight, can be stored everywhere, so easily transportable. Detailed description:
Une épingle Fig. 1 ( 1), ou une portion de celle-ci Fig. 2 ( 1 ), Fig. 3 ( 1 ), pouvant être aimantée Fig. 1 (2), Fig. 2 (2), Fig. 3 (2) à l'une de ses extrémités. Cette dite épingle Fig. 1 ( 1 ), ou une portion de celle-ci Fig. 2 (1), Fig. 3 ( 1), doit être faite d'une substance ferromagnétique soit; du fer, du nickel, du cobalt, du gadolinium ou encore d'un alliage contenant un ou plusieurs de ces métaux. A pin Fig. 1 (1), or a portion thereof 2 (1), FIG. 3 (1), magnetizable Fig. 1 (2), FIG. 2 (2), FIG. 3 (2) at one of its ends. This pin, Fig. 1 (1), or a portion thereof 2 (1), FIG. 3 (1), must be made of a ferromagnetic substance either; iron, nickel, cobalt, gadolinium or an alloy containing one or more of these metals.
L'épingle Fig. 1 ( 1 ), ou une portion de celle-ci Fig. 2 (1), Fig. 3 ( 1), aimantée Fig. 1 (2), Fig. 2 (2), Fig. 3 (2) à l'une de ses extrémités est introduite par moulage ou par perçage dans un étui Fig.The pin Fig. 1 (1), or a portion thereof 2 (1), FIG. 3 (1), magnetized 1 (2), FIG. 2 (2), FIG. 3 (2) at one of its ends is introduced by molding or by drilling into a case Fig.
1 (3), Fig. 2 (3), Fig. 3 (3) ou un fourreau Fig. 1 (3), Fig. 2 (3), Fig. 3 (3). Ce dit étui Fig. 1 (3), Fig.1 (3), FIG. 2 (3), FIG. 3 (3) or a sleeve Fig. 1 (3), FIG. 2 (3), FIG. 3 (3). This said case Fig. 1 (3), FIG.
2 (3), Fig. 3 (3) ou ce dit fourreau Fig. 1 (3), Fig. 2 (3), Fig. 3 (3) fabriqué de matière flottante telle du plastique, ou toute matière semblable, ayant la capacité de flotter (densité inférieure à un), donc insubmersible. 2 (3), FIG. 3 (3) or said sleeve FIG. 1 (3), FIG. 2 (3), FIG. 3 (3) made of floating material such as plastic, or any similar material, having the ability to float (density less than one), therefore unsinkable.
L'épingle Fig. 1 ( 1 ), ou une portion de celle-ci Fig. 2 ( 1), Fig. 3 ( 1 ), dans son étui flottant Fig. 1 (3), Fig. 2 (3), Fig. 3 (3) ou dans son fourreau flottant Fig. 1 (3), Fig. 2 (3), Fig. 3 (3) peut se nommer : L'épingle insubmersible boussole de survie Fig. 1 , Fig. 2, Fig. 3. L'épingle insubmersible boussole de survie Fig. l , Fig. 2, Fig.3, ayant une pointe à l'une de ses extrémités Fig. 1 (4), Fig. 2 (4), Fig. 3 (4) telle une flèche montrant la direction, pour faciliter l'identification visuelle de la direction du point cardinal Nord magnétique terrestre. Une lettre « N » Fig. 1 (5), Fig. 2 (5), Fig. 3 (5) gravée ou poinçonnée près de la pointe, pour identifier en langage universel et généralement reconnu, la direction du point cardinal Nord magnétique terrestre. The pin Fig. 1 (1), or a portion thereof 2 (1), FIG. 3 (1), in its floating case Fig. 1 (3), FIG. 2 (3), FIG. 3 (3) or in its floating sheath Fig. 1 (3), FIG. 2 (3), FIG. 3 (3) can be named: The unsinkable pin survival compass Fig. 1, Fig. 2, FIG. 3. The unsinkable pin survival compass Fig. 1, FIG. 2, Fig.3, having a tip at one of its ends. 1 (4), FIG. 2 (4), FIG. 3 (4) as an arrow showing the direction, to facilitate visual identification of the direction of the terrestrial magnetic North cardinal point. A letter "N" Fig. 1 (5), FIG. 2 (5), FIG. 3 (5) engraved or punched near the point, to identify in universal and generally recognized language, the direction of the terrestrial magnetic North cardinal point.
L'épingle insubmersible boussole de survie Fig. 1 , Fig. 2, Fig.3 peut être fait de plastique Fig. 1 (3), Fig. 2 (3), Fig. 3 (3) luminescent « glow-in-the-dark » pour une uti lisation nocturne. The unsinkable pin survival compass Fig. 1, Fig. 2, Fig.3 can be made of plastic Fig. 1 (3), FIG. 2 (3), FIG. 3 (3) glow-in-the-dark luminescent for night use.
L'épingle insubmersible boussole de survie Fig. l , Fig. 2, Fig.3, doit être mise sur ou dans un liquide, tel de l'eau. De plus, ladite épingle Fig. l , Fig. 2, Fig.3 doit disposer d'un espace suffisant et d'Un contenant non-ferromagnétique pour lui permettre de tourner librement sur elle-même et indiquera le Nord magnétique terrestre en tout point sur la planète Terre. L'épingle insubmersible boussole de survie Fig. l , Fig. 2, Fig.3 de par sa petite taille, évite de transporter une boussole standard sur soi et sera toujours utile lorsque la technologie (GPS, cellulaire,...) se retrouve au point mort. Ladite épingle Fig. l , Fig. 2, Fig.3 est nouvelle et unique parce qu'insubmersible, de plus elle est pratique de par sa petitesse et son poid infime, pouvant être ranger partout, donc facilement transportable. The unsinkable pin survival compass Fig. 1, FIG. 2, Fig.3, must be put on or in a liquid, such as water. In addition, said pin Fig. 1, FIG. 2, Fig.3 must have sufficient space and a non-ferromagnetic container to allow it to rotate freely on itself and indicate the Earth's magnetic North at any point on the planet Earth. The unsinkable pin survival compass Fig. 1, FIG. 2, Fig.3 because of its small size, avoids carrying a standard compass and will always be useful when the technology (GPS, cellular, ...) is stalled. Said pin 1, FIG. 2, Fig.3 is new and unique because insubmersible, in addition it is practical for its smallness and its small weight, can be stored everywhere, so easily transportable.
Exemples d'utilisation : Examples of use:
- L'épingle insubmersible boussole de survie est un objet très petit pouvant s'introduire partout, évitant d'avoir une boussole standard sur soi. Une fois mise dans un liquide tel de l'eau, ladite épingle indique le Nord magnétique terrestre partout sur la Terre. Ladite épingle est nouvelle et unique parce qu'insubmersible, de plus elle est pratique de par sa petitesse et son poid infime, pouvant être ranger partout, donc facilement transportable. - The insubmersible pin survival compass is a very small object that can be introduced everywhere, avoiding having a standard compass on you. Once placed in a liquid such as water, the pin indicates the Earth's magnetic North everywhere on the Earth. Said pin is new and unique because insubmersible, moreover it is practical for its smallness and its small weight, can be stored everywhere, so easily transportable.

Claims

REVENDICATIONS
1. Une boussole de survie portative et insubmersible comprenant : une épingle aimantée ayant une extrémité pointue; et un fourreau flottant recevant à l'intérieur de celui-ci une partie de l'épingle, dont au moins l'extrémité pointue de celle-ci. A portable and unsinkable survival compass comprising: a magnetic pin having a pointed end; and a floating sheath receiving inside thereof a portion of the pin, including at least the pointed end thereof.
2. La boussole de survie portative et insubmersible de la revendication 1, caractérisée en ce que l'épingle aimantée a une tête à une extrémité opposée à l'extrémité pointue; le fourreau flottant recevant à l'intérieur de celui-ci toute l'épingle aimantée à l'exception de la tête de celle-ci. The portable and unsinkable survival compass of claim 1, characterized in that the magnetized pin has a head at an end opposite the pointed end; the floating sheath receiving inside it all the magnetic pin except the head thereof.
3. La boussole de survie portative et insubmersible de la revendication 1, caractérisée en ce que le fourreau est de forme allongée dans le sens de l'épingle. 3. The portable and unsinkable survival compass of claim 1, characterized in that the sheath is elongated in the direction of the pin.
4. La boussole de survie portative et insubmersible de la revendication 3, caractérisée en ce que le fourreau est marqué de la lettre « N » près d'une extrémité longitudinale de celui-ci, du côté de l'extrémité pointue de l'épingle aimantée. 4. The portable and unsinkable survival compass of claim 3, characterized in that the sleeve is marked with the letter "N" near a longitudinal end thereof, on the side of the pointed end of the pin magnetized.
5. La boussole de survie portative et insubmersible de la revendication 1, caractérisée en ce que le fourreau définie une pointe du côté de l'extrémité pointue de l'épingle. 5. The portable and unsinkable survival compass of claim 1, characterized in that the sheath defines a point on the side of the pointed end of the pin.
6. La boussole de survie portative et insubmersible de la revendication 1, caractérisée en ce que le fourreau est fait d'une matière plastique. 6. The portable and unsinkable survival compass of claim 1, characterized in that the sheath is made of a plastic material.
7. La boussole de survie portative et insubmersible de la revendication 1, caractérisée en ce que le fourreau est fait d'un matériau ayant une densité inférieure à un. 7. The portable and unsinkable survival compass of claim 1, characterized in that the sheath is made of a material having a density less than one.
8. La boussole de survie portative et insubmersible de la revendication 1 , caractérisée en ce que le fourreau est luminescent. 8. The portable and unsinkable survival compass of claim 1, characterized in that the sheath is luminescent.
9. La boussole de survie portative et insubmersible de la revendication 1, caractérisée en ce que l'épingle est faite d'une substance ferromagnétique incluant au moins un des matériaux sélectionnés dans le groupe constitué du fer, nickel, cobalt, gadolinium et d'un alliage d'un de ces matériaux. 9. The portable and unsinkable survival compass of claim 1, characterized in that the pin is made of a ferromagnetic substance including at least one of the materials selected from the group consisting of iron, nickel, cobalt, gadolinium and an alloy of one of these materials.
10. La boussole de survie portative et insubmersible de la revendication 1, caractérisée en ce que l'épingle est insérée dans le fourreau par moulage. 10. The portable and unsinkable survival compass of claim 1, characterized in that the pin is inserted into the sheath by molding.
PCT/CA2017/000177 2016-08-10 2017-07-26 Unsinkable pin used as a survival compass WO2018027294A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CA2,938,515 2016-08-10
CA2938515A CA2938515A1 (en) 2016-08-10 2016-08-10 Buoyant pin used as a survival compass

Publications (1)

Publication Number Publication Date
WO2018027294A1 true WO2018027294A1 (en) 2018-02-15

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Country Status (2)

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CA (1) CA2938515A1 (en)
WO (1) WO2018027294A1 (en)

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
THE CHINESE INVENTED IT: THE COMPASS (AND HOW TO MAKE YOUR OWN, 10 June 2013 (2013-06-10), pages 1 - 5, XP055462909, Retrieved from the Internet <URL:http://www.mariespastiche.com/2013/06/the-chinese-invented-it-compass-and-how.html> [retrieved on 20171102] *
TODAY, I LEARNED ...: DIY COMPASS, 24 July 2011 (2011-07-24), XP055462903, Retrieved from the Internet <URL:http://dailyscholar.tumblr.com/post/7995820934/72311-diy-compass> [retrieved on 20170000] *

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