US3601921A - Magnetic toy or building block - Google Patents

Magnetic toy or building block Download PDF

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Publication number
US3601921A
US3601921A US3601921DA US3601921A US 3601921 A US3601921 A US 3601921A US 3601921D A US3601921D A US 3601921DA US 3601921 A US3601921 A US 3601921A
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block
magnetic
magnets
blocks
faces
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Robert F Strohmaier
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Robert F Strohmaier
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    • AHUMAN NECESSITIES
    • A63SPORTS; GAMES; AMUSEMENTS
    • A63HTOYS, e.g. TOPS, DOLLS, HOOPS, BUILDING BLOCKS
    • A63H33/00Other toys
    • A63H33/04Building blocks, strips, or similar building parts
    • A63H33/046Building blocks, strips, or similar building parts comprising magnetic interaction means, e.g. holding together by magnetic attraction

Abstract

A magnetic toy or building block having four of the six faces provided with magnetic pieces, with the same polarity being provided with the opposite faces, whereby the blocks upon being assembled together need to be assembled so faces of unlined polarity are joined and wherein the faces of line polarity or with no magnets in them will not properly be joined in the structure. The completed building block structure after the blocks are properly joined will be unitary mass so that upon lifting the mass by one of the blocks the other blocks will be lifted in mass with it. The blocks will be made of separate top and bottom sections and crossed magnetic retainer elements placing all magnets in the same central plane. The block sections and magnets within and retainers are joined together by adhesive or cement. A plastic coated metal plate is provided to which two of the blocks can be attached to illustrate the manner of attaching the blocks together and for testing the polarity of the respective side faces of the block.

Description

United States Patent 72] Inventor Robert F. Strohmaier P.0. Box 92, E. Main St., Yates City, Ill. 61572 [21] Appl. No. 843,488 [22] Filed July 22,1969 [45] Patented Aug. 31, 1971 [54] MAGNETIC TOY 0R BUILDING BLOCK 6' Claims, 10 Drawing Figs. [52] US. Cl 46/25 [51] Int. Cl A63h 33/08 [50] Field of Search 46/25, 24, 16, 17; 35/69, 70, 71,72, 73 [56] References Cited UNITED STATES PATENTS 3,254,440 6/1966 Duggar 46/25 Primary Examiner-Louis G. Mancene Assistant Examiner-J. Q. Lever Attorney-Polachek & Saulsbury ABSACT: A magnetic toy or building block having four of the six faces provided with magnetic pieces, with the same polarity being provided with the opposite faces, whereby the blocks upon being assembled together need to be assembled so faces of unlined polarity are joined and wherein the faces of line polarity or with no magnets in them will not properly be joined in the structure. The completed building block structure after the blocks are properly joined will be unitary mass so that upon lifting the mass by one of the blocks the other blocks will be lifted in mass with it. The blocks will be made of separate top and bottom sections and crossed magnetic retainer elements placing all magnets in the same central plane. The block sections and magnets within and retainers are joined together by adhesive or cement. A plastic coated metal plate is provided to which two of the blocks can be attached to illustrate the manner of attaching the blocks together and for testing the polarity of the respective side faces of the block.

PATENTED M183] 1% SHEET 1 [IF 2 PATENTED M331 I971 3,601. 921

sum 2 [1F 2 m'vaw 0/. ROBERT F. STIROHMAIER MAGNETIC TOY R BUILDING BLOCK This invention relates to magnetic toy building blocks and more particularly to the construction of the same.

It is an object of the present invention to provide a plastic cube made of two pieces of colored molded nonmagnetic material cemented or adhered together in the center with four small magnets adhered to the block parts in the same horizontal central plane so that the outside faces of the magnets are of the same polarity and which will require additional skill in the use of the blocks due to the attraction and repulsion of the magnet of adjacent blocks when trying to build with them and wherein there is required the need of opposite polarity sides in order for the blocks to be connected together.

It is another object of the invention tea-provide a magnetic toy building block in which the block is made of separable housing parts and separable magnet retaining parts, the magnet retaining parts having finlike projections extending from a cradlelike portion andthe respective casing parts having guide faces for receiving the tins of the magnet holding parts such that the magnetic holding parts are held against twisting in the casing parts.

It is another object of the invention to provide a magnetic toy block that can be adhered to opposite sides of a metal disc such as may be suspended from a support overlying a baby carriage and with which the baby may play to join the blocks to the suspended metal plate and wherein the infant will not only learn to apply the blocks to the depending metal disc but to pull them from the same and learn that they can be assembled by certain of the sides of the block.

Other objects of the invention are to provide a light weight magnetic plastic toy building block, having the above objects in mind, which is of simple construction, light in weight, inexpensive to manufacture, easy to assemble, provided with rounded corners, made from half shells of identical design and size, of similar size and shape, top and bottom magnet retainers, enjoyed by both young and old, by providing a further challenge in the assembling of blocks of strong but light construction, and inexpensive to manufacture and assemble.

For a better understanding of the invention reference may be had to the following detailed description taken in connection with the accompanying drawings, in which FIG. l is a top perspective view of one of the building blocks constructed according to the present invention,

FIG. 2 is a vertical sectional view thereof taken on line 22 of FIG. 1,

FIG. 3 is a top plan view looking into the open end of one of the parts,

FIG. 4 is a vertical sectional view of the one part as viewed on line l-d of FIG. 3,

FIG. 5 is a top plan view of one of the magnetic retainers,

FIG. 6 is an end elevational view of the magnetic retainer taken on line 6-6 of FIG. 5,

FIG. 7 is a collective perspective view of the several parts of which the block is made,

FIG. 8 is a metal disc coated with plastic on which two of the blocks may be assembled by an infant,

FIG. 9 is a horizontal sectional view of the disc taken on line 9--9 of FIG. 3,

FIG. 10 is a perspective view of a carriage containing a child with the metal plate suspended from an overlying bar on the carriage and with two of the magnetic blocks attached thereto with the infant removing or attaching the blocks to the metal disc.

Referring now to the figures, a magnetic toy building block shown generally at is assembled from top and bottom parts 16 and I7 molded to provide thin shells with rounded comers l8 and edges 19 to prevent injury to infants or small children when handling the finished blocks. Each of the top and bottom sections are molded to have pairs of spaced guide portions on the inner sides of each of the four faces of the block halves .as

indicated at 211 and providing open slots 22 for receiving end edges 23 of fins 23 of a magnet retainer indicated generally at 24 and with these tins 23 centrally connected to a half sleeve portion 25 in which magnets 26 are supported in such, a manner that the opposite magnet ends are of the same polarity adjacent to their opposite faces of the block. I ,1

The internal corners of the block sections as indicated at 27 are reinforced and diagonally'opposite reinforced corners 27 have holes 28 while opposite diagonal corners have assembly pins 29 projecting therefrom. I

The inner faces of the sides of the block halves are cutaway as indicated at 3i to receive the endsof the magnets 26 and by providing a shoulder thickness 32 serve to hold the magnets against displacement between the sides of the blocks sections, upon the section being joined together are pins 29 and holes 28 in the corners of the block sections.

The magnetic retainer 24 adapted to be assembled in the bottom block section 17 is twisted to align another pair of magnets 26 turned from the first pair of magnets in the top section and the supporting half sleeve portions overlying one another by allowing the magnets to lie in a common central plane equidistant from the top and bottom faces of the respective top and bottom block sections 16 and 17. When the block sections are assembled together they are glued or secured along their assembled edges and the entire assemblage will provide a unitary structure with all magnets in a central plane and with the magnet ends of right polarity lying in opposite side faces of the block, the polarity of the other side faces angled 90 will be of a different polarity whereby upon starting from one side face of the block ultimate polarity of the side faces upon going about the side of the block will be found.

It will be apparent that there has now been described a plain plastic cube or block with all of the corners and edges rounded to prevent injury to infants or small children when handling the blocks. It is also apparent that the block is made up of two half shells or sections, two magnetic retainers and four cylinder magnets 26, the top and bottom half section being of identical section and as well the top and bottom magnet retainers being of identical design. The magnetic retainers will have been slid into four slots in the half shell so that the magnets extend in a common plane and upon the magnet retainer of the other half shell, upon the half shells being shown, the magnets will extend in the same plane centrally of the block and with the magnets of the one block.

The magnets are cemented in the half sleeve portions and the joined edges of the shell are similarly adhered or cemented. The shell material and the block material are made of nontoxic plastic or material so that the health of the infant will not be effected. The wall thickness of the shells and the magnetic retainers are approximately one-sixteenth of an inch thick but with the walls being cut away at 31 the thickness is reduced to fifteenor twentythousandltbs of an inch so that the magnetic pull is not greatly effected from the block material.

These blocks or tubes can be sold in sets with a plastic coated metal disc 35 tapered at one side to provide an extended end 36 with a string hole 37 therein. The plastic coating is indicated at 38 and completely covers the metal disc portion 35. This disc assumes a teardrop shape and can be attached by a string 39 to an overhead support bar 411 on a baby carriage 42 within reach of ends 43 and 44, of an infant lying within the carriage. The plastic coating on the disc is nontoxic and the disc is within easy reach of the infants hand and when the infant is provided with blocks is he may by chance find magnetic faces on the blocks which will. adhere themselves to the metal disc 35.

The block sections can be made of color plastic and the purchaser may glue or paste upon the faces of the blocks any decals of their choice. This would add creative matter to the blocks for use by children in addition to their block magnetic properties. Upon assembling the blocks a face N" polarity of one block will attach itself to 8" polarity of another block. While the block face with N" will be'repelled from an N" polarity face of another block. If one of the magnetic faces of one block is matched with a neutral face of another block nothing happens and the blocks will not be secured together, thereby making need for finding a proper magnetic face so that when all of the blocks are stacked with one another they will be magnetically joined together. The users of the blocks will be fascinated because of the way the blocks will react or fall off from the neutral faces of the blocks or the magnetic faces be repelled from one another.

What is claimed is:

l. A magnetic toy block having four magnets assembled within the block and in the same common plane, extending through the block, the polarity of opposite side faces being the same, and the remaining two side faces of the block being without magnets and of neutral polarity, said block being formed of top and bottom hollow shell section, magnet retainers holding the magnets and assembled in the respective top and bottom shell sections, each magnetic retainer holding two magnets and-the magnetic retainer of one section being angled 90 from the other section, each of the magnetic retainers comprising four supporting fins angled 90 apart and a half sleeve portion carried by the fins, the magnets lying in the ends of the half sleeve portions, and means on the inner walls of the top and bottom sections serving to orient and retain the magnetic retainer in the shell sections.

2. A magnetic toy block as defined in claim 1, and said means .for retaining the magnetic retainers oriented in the shell section comprisingpairs of spaced projections on the inner sides of the shell faces and providing slots therebetween, and said magnet retainers having fin edges extended into the slots provided by the pairs of spaced projections.

3. A magnetic toy block as defined inclaim 2, and said side faces of the shell section on the inner faces being cut away and affording shoulders for supporting the outer ends of magnets, said magnets being of cylindrical shape and having their ends overlying the ends of the half sleeve portion of the magnet retainers.

4. A magnetic toy block as defined in claim 3, and said open edges of the half shell sections having fin and slot means for the joining of the half sections together.

S. A magnetic toy block as defined in claim 4, and said outer comers and side edges of the block section being rounded.

6. A magnetic toy block as defined in claim 1, and a plastic coated metal plate of teardrop shape with an extended .side portion with a string hold therein, said metal plate adapted to be suspended through the string hole and to the sides of which the magnetic blocks can be attached to provide thereby an infants toy.

Claims (6)

1. A magnetic toy block having four magnets assembled within the block and in the same common plane, extending through the block, the polarity of opposite side faces being the same, and the remaining two side faces of the block being without magnets and of neutral polarity, said block being formed of top and bottom hollow shell section, magnet retainers holding the magnets and assembled in the respective top and bottom shell sections, each magnetic retainer holding two magnets and the magnetic retainer of one section being angled 90* from the other section, each of the magnetic retainers comprising four supporting fins angled 90* apart and a half sleeve portion carried by the fins, the magnets lying in the ends of the half sleeve portions, and means on the inner walls of the top and bottom sections serving to orient and retain the magnetic retainer in the shell sections.
2. A magnetic toy block as defined in claim 1, and said means for retaining the magnetic retainers oriented in the shell section comprising pairs of spaced projections on the inner sides of the shell faces and providing slots therebetween, and said magnet retainers having fin edges extended into the slots provided by the pairs of spaced projections.
3. A magnetic toy block as defined in claim 2, and said side faces of the shell section on the inner faces being cut away and affording shoulders for supporting the outer ends of magnets, said magnets being of cylindrical shape and having their ends overlying the ends of the half sleeve portion of the magnet retainers.
4. A magnetic toy block as defined in claim 3, and said open edges of the half shell sections having fin and slot means for the joining of the half sections together.
5. A magnetic toy block as defined in claim 4, and said outer corners and sIde edges of the block section being rounded.
6. A magnetic toy block as defined in claim 1, and a plastic coated metal plate of teardrop shape with an extended side portion with a string hold therein, said metal plate adapted to be suspended through the string hole and to the sides of which the magnetic blocks can be attached to provide thereby an infant''s toy.
US3601921A 1969-07-22 1969-07-22 Magnetic toy or building block Expired - Lifetime US3601921A (en)

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Cited By (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5409236A (en) * 1993-12-23 1995-04-25 Therrien; Joel M. Magnetic game or puzzle and method for making same
EP0728506A1 (en) * 1995-01-25 1996-08-28 Stuff Co., Ltd. Block toy
US5926925A (en) * 1994-01-06 1999-07-27 Hicks; Joel R. Magnetic sock holder
US20050118925A1 (en) * 2002-02-01 2005-06-02 Michael Kretzschmar Construction kit
US20050155308A1 (en) * 2004-01-16 2005-07-21 Kowalski Charles J. Magnetic construction modules for creating three-dimensional assemblies
US20050159074A1 (en) * 2004-01-16 2005-07-21 Kowalski Charles J. Magnetic construction kit with wheel-like components
US20050159076A1 (en) * 2004-01-16 2005-07-21 Kowalski Charles J. Magnetic construction module with interchangeable magnet holders
US20050242911A1 (en) * 2004-04-30 2005-11-03 Junji Hiromori Magnetic device
US20060084300A1 (en) * 2004-10-15 2006-04-20 Kowalski Charles J Magnetic construction kit adapted for use with construction blocks
WO2006044859A2 (en) * 2004-10-19 2006-04-27 Mega Brands International, Luxembourg, Zug Branch Illuminated, three-dimensional modules with coaxial magnetic connectors for a toy construction kit
US20060131989A1 (en) * 2004-10-15 2006-06-22 Parvis Daftari Illuminated, three-dimensional modules for a magnetic toy construction kit
US20060137270A1 (en) * 2004-12-10 2006-06-29 Parvis Daftari Magnetic toy construction modules with side-mounted magnets
US20060179778A1 (en) * 2004-12-10 2006-08-17 Kowalski Charles J Magnetic toy construction modules with corner-adjacent magnets
US20070167260A1 (en) * 1998-10-01 2007-07-19 Cope Jeffrey L Golf ball position marker assembly
WO2007130504A2 (en) * 2006-05-01 2007-11-15 Heroes Will Rise, Inc. Organic magnetic construction module
US7383653B1 (en) 2005-03-30 2008-06-10 Hiromori Corporation Magnet device
US20080139077A1 (en) * 2006-12-08 2008-06-12 Claire Jean Patton Construction set utilizing magnets
US20090015361A1 (en) * 2007-07-09 2009-01-15 Mega Brands International Magnetic and electronic toy construction systems and elements
US20100038850A1 (en) * 2004-06-02 2010-02-18 Jose Maxenchs Tenorio Puzzle Formed By A Plurality Of Cubes
US20100056013A1 (en) * 2008-08-27 2010-03-04 Matthew Lamport Kaplan Magnetic Toy Construction Piece and Set
US20100242250A1 (en) * 2009-03-26 2010-09-30 Tegu Magnetic blocks and method of making magnetic blocks
US20100289485A1 (en) * 2009-05-15 2010-11-18 Infineon Technologies Ag System including a magnet and first and second concentrators
WO2011136682A1 (en) * 2010-04-30 2011-11-03 Ostrovskiy Alexander Grigorievich Modular magnetic play device
US20120270465A1 (en) * 2009-12-18 2012-10-25 Orda Korea Co., Ltd. Magnet mounting component and magnet toy
CN103463816A (en) * 2012-06-07 2013-12-25 联建(中国)科技有限公司 Conductive magnetic building block
US20150283475A1 (en) * 2014-04-04 2015-10-08 Corey Hiller Magnetic building block system
US9457288B2 (en) * 2015-01-20 2016-10-04 Click-Block Corporation Magnetic block toy
JP2017533812A (en) * 2015-08-27 2017-11-16 譚 ▲ジュエ▼宝 Magnetic connection building blocks
US20180056204A1 (en) * 2016-08-31 2018-03-01 Gary Knudsen Magnet Building Block Assembly

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3254440A (en) * 1962-05-21 1966-06-07 Robert G Duggar Magnetic toy building blocks

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3254440A (en) * 1962-05-21 1966-06-07 Robert G Duggar Magnetic toy building blocks

Cited By (57)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5409236A (en) * 1993-12-23 1995-04-25 Therrien; Joel M. Magnetic game or puzzle and method for making same
US5926925A (en) * 1994-01-06 1999-07-27 Hicks; Joel R. Magnetic sock holder
EP0728506A1 (en) * 1995-01-25 1996-08-28 Stuff Co., Ltd. Block toy
US20070167260A1 (en) * 1998-10-01 2007-07-19 Cope Jeffrey L Golf ball position marker assembly
US7066778B2 (en) 2002-02-01 2006-06-27 Mega Bloks International S.A.R.L. Construction kit
US20050118925A1 (en) * 2002-02-01 2005-06-02 Michael Kretzschmar Construction kit
US7833078B2 (en) 2002-02-01 2010-11-16 Mega Brands International S.A.R.L., Luxembourg, Zug Branch Construction kit
US20060205316A1 (en) * 2002-02-01 2006-09-14 Michael Kretzschmar Construction kit
US8475225B2 (en) 2002-02-01 2013-07-02 Mega Brands International Construction kit
US20110039473A1 (en) * 2002-02-01 2011-02-17 Mega Brands International, S.A.R.L., Luxembourg, Zug Branch Construction Kit
US20050159076A1 (en) * 2004-01-16 2005-07-21 Kowalski Charles J. Magnetic construction module with interchangeable magnet holders
US20050155308A1 (en) * 2004-01-16 2005-07-21 Kowalski Charles J. Magnetic construction modules for creating three-dimensional assemblies
US7273404B2 (en) 2004-01-16 2007-09-25 Mega Brands America, Inc. Magnetic construction modules for creating three-dimensional assemblies
US20050159074A1 (en) * 2004-01-16 2005-07-21 Kowalski Charles J. Magnetic construction kit with wheel-like components
US7234986B2 (en) 2004-01-16 2007-06-26 Mega Brands America, Inc. Magnetic construction kit with wheel-like components
US7071802B2 (en) * 2004-04-30 2006-07-04 Hiromori Corporation Magnetic device
US20050242911A1 (en) * 2004-04-30 2005-11-03 Junji Hiromori Magnetic device
US20100038850A1 (en) * 2004-06-02 2010-02-18 Jose Maxenchs Tenorio Puzzle Formed By A Plurality Of Cubes
US20060084300A1 (en) * 2004-10-15 2006-04-20 Kowalski Charles J Magnetic construction kit adapted for use with construction blocks
WO2006044613A2 (en) * 2004-10-15 2006-04-27 Mega Brands International, Luxembourg, Zug Branch Magnetic construction kit adapted for use with construction blocks
US7255624B2 (en) 2004-10-15 2007-08-14 Mega Brands America, Inc. Illuminated, three-dimensional modules for a magnetic toy construction kit
US20060131989A1 (en) * 2004-10-15 2006-06-22 Parvis Daftari Illuminated, three-dimensional modules for a magnetic toy construction kit
WO2006044613A3 (en) * 2004-10-15 2009-05-14 Mega Brands International Luxe Magnetic construction kit adapted for use with construction blocks
WO2006044859A3 (en) * 2004-10-19 2007-07-19 Mega Brands International Luxe Illuminated, three-dimensional modules with coaxial magnetic connectors for a toy construction kit
US7322873B2 (en) 2004-10-19 2008-01-29 Mega Brands America, Inc. Illuminated, three-dimensional modules with coaxial magnetic connectors for a toy construction kit
US20060134978A1 (en) * 2004-10-19 2006-06-22 Rosen Lawrence I Illuminated, three-dimensional modules with coaxial magnetic connectors for a toy construction kit
WO2006044859A2 (en) * 2004-10-19 2006-04-27 Mega Brands International, Luxembourg, Zug Branch Illuminated, three-dimensional modules with coaxial magnetic connectors for a toy construction kit
US20060179778A1 (en) * 2004-12-10 2006-08-17 Kowalski Charles J Magnetic toy construction modules with corner-adjacent magnets
US20060137270A1 (en) * 2004-12-10 2006-06-29 Parvis Daftari Magnetic toy construction modules with side-mounted magnets
US7383653B1 (en) 2005-03-30 2008-06-10 Hiromori Corporation Magnet device
US20080108275A1 (en) * 2006-05-01 2008-05-08 Cas Holman Organic Magnetic Construction Module
WO2007130504A2 (en) * 2006-05-01 2007-11-15 Heroes Will Rise, Inc. Organic magnetic construction module
US7641534B2 (en) * 2006-05-01 2010-01-05 Cas Holman Organic magnetic construction module
WO2007130504A3 (en) * 2006-05-01 2008-10-16 Heroes Will Rise Inc Organic magnetic construction module
US7507136B2 (en) 2006-12-08 2009-03-24 Claire Jean Patton Construction set utilizing magnets
US20080139077A1 (en) * 2006-12-08 2008-06-12 Claire Jean Patton Construction set utilizing magnets
US7887056B2 (en) * 2007-02-02 2011-02-15 Educocio S.L. Puzzle formed by a plurality of cubes
US8292687B2 (en) 2007-07-09 2012-10-23 Mega Brands International Magnetic and electronic toy construction systems and elements
US8303366B2 (en) 2007-07-09 2012-11-06 Mega Brands International Magnetic and electronic toy construction systems and elements
US20090015361A1 (en) * 2007-07-09 2009-01-15 Mega Brands International Magnetic and electronic toy construction systems and elements
US7955155B2 (en) 2007-07-09 2011-06-07 Mega Brands International Magnetic and electronic toy construction systems and elements
US20110201247A1 (en) * 2007-07-09 2011-08-18 Mega Brands International, S.A.R.L., Luxembourg, Zug Branch Magnetic And Electronic Toy Construction Systems And Elements
US8529311B2 (en) 2007-07-09 2013-09-10 Mega Brands International Magnetic and electronic toy construction systems and elements
US20100056013A1 (en) * 2008-08-27 2010-03-04 Matthew Lamport Kaplan Magnetic Toy Construction Piece and Set
US8850683B2 (en) 2009-03-26 2014-10-07 Tegu Magnetic blocks and method of making magnetic blocks
US9662592B2 (en) 2009-03-26 2017-05-30 Clipper Investment Holdings Ltd. Magnetic blocks and method of making magnetic blocks
US20100242250A1 (en) * 2009-03-26 2010-09-30 Tegu Magnetic blocks and method of making magnetic blocks
US9266032B2 (en) 2009-03-26 2016-02-23 Clipper Investment Holdings Ltd. Magnetic blocks and method of making magnetic blocks
US8087305B2 (en) * 2009-05-15 2012-01-03 Infineon Technologies Ag System including a magnet and first and second concentrators
US20100289485A1 (en) * 2009-05-15 2010-11-18 Infineon Technologies Ag System including a magnet and first and second concentrators
US20120270465A1 (en) * 2009-12-18 2012-10-25 Orda Korea Co., Ltd. Magnet mounting component and magnet toy
WO2011136682A1 (en) * 2010-04-30 2011-11-03 Ostrovskiy Alexander Grigorievich Modular magnetic play device
CN103463816A (en) * 2012-06-07 2013-12-25 联建(中国)科技有限公司 Conductive magnetic building block
US20150283475A1 (en) * 2014-04-04 2015-10-08 Corey Hiller Magnetic building block system
US9457288B2 (en) * 2015-01-20 2016-10-04 Click-Block Corporation Magnetic block toy
JP2017533812A (en) * 2015-08-27 2017-11-16 譚 ▲ジュエ▼宝 Magnetic connection building blocks
US20180056204A1 (en) * 2016-08-31 2018-03-01 Gary Knudsen Magnet Building Block Assembly

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