US2728451A - Metal sheet and corner protector - Google Patents

Metal sheet and corner protector Download PDF

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Publication number
US2728451A
US2728451A US246197A US24619751A US2728451A US 2728451 A US2728451 A US 2728451A US 246197 A US246197 A US 246197A US 24619751 A US24619751 A US 24619751A US 2728451 A US2728451 A US 2728451A
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US
United States
Prior art keywords
sheet
protector
corner
corners
corner protector
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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.)
Expired - Lifetime
Application number
US246197A
Inventor
Russell J Leander
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Chicago Show Printing Co
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Chicago Show Printing Co
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Filing date
Publication date
Application filed by Chicago Show Printing Co filed Critical Chicago Show Printing Co
Priority to US246197A priority Critical patent/US2728451A/en
Application granted granted Critical
Publication of US2728451A publication Critical patent/US2728451A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D81/02—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents specially adapted to protect contents from mechanical damage
    • B65D81/05—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents specially adapted to protect contents from mechanical damage maintaining contents at spaced relation from package walls, or from other contents
    • B65D81/053—Corner, edge or end protectors
    • B65D81/055—Protectors contacting three surfaces of the packaged article, e.g. three-sided edge protectors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2581/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D2581/02—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents specially adapted to protect contents from mechanical damage
    • B65D2581/05—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents specially adapted to protect contents from mechanical damage maintaining contents at spaced relation from package walls, or from other contents
    • B65D2581/051—Details of packaging elements for maintaining contents at spaced relation from package walls, or from other contents
    • B65D2581/052—Materials
    • B65D2581/053—Paper in general, e.g. paperboard, carton, molded paper
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2581/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D2581/02—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents specially adapted to protect contents from mechanical damage
    • B65D2581/05—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents specially adapted to protect contents from mechanical damage maintaining contents at spaced relation from package walls, or from other contents
    • B65D2581/051—Details of packaging elements for maintaining contents at spaced relation from package walls, or from other contents
    • B65D2581/052—Materials
    • B65D2581/055—Plastic in general, e.g. foamed plastic, molded plastic, extruded plastic
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S24/00—Buckles, buttons, clasps
    • Y10S24/11—Adhesive
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T24/00—Buckles, buttons, clasps, etc.
    • Y10T24/20—Paper fastener
    • Y10T24/202—Resiliently biased
    • Y10T24/205—One piece
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T24/00—Buckles, buttons, clasps, etc.
    • Y10T24/20—Paper fastener
    • Y10T24/207—Adhesive

Definitions

  • This invention relates in general to a corner protector and is more particularly described as a corner protector for sheet metal such as thin sheet steel, copper, aluminum, and other metals or even sheets of paper, fiber, cardboard, and the like.
  • sheet materials of these various kinds When sheet materials of these various kinds are stacked for storage or are handled for shipment, they may be easily bent, crumpled or damaged at the corner or corners, which results in a loss of time to straighten out the bent corner or any material to cut away the damaged portion.
  • the present invention provides an easily attachable thin angular protector which may be easily applied to a single corner or to all of the corners of a sheet of material for the purpose of protecting the material while it is being handled or when it is stacked or stored.
  • An important object of the invention is to provide a corner protector which may be quickly and easily applied to one or all of the corners of a sheet.
  • a further object of the invention is to provide a pressure sensitive adhesive on the protector so that it will adhere to any corner of sheet material to which it is applied and may be easily removed therefrom without damaging or defacing the corner or in applying or removing the protector.
  • a further object of the invention is to provide a foldable angular piece of sheet material which is scored so that it will fold over the opposite side faces of a sheet material at the corner thereof, the outer face of the protector being scufi-resistant and the inner face of the material having a pressure sensitive adhesive for causing it to adhere closely to both surfaces of the sheet to which it is applied.
  • Fig. l is a plan view of a corner protector in accordance with this invention showing the pressure adhesive side and the score line upon which it is foldable;
  • Fig. 2 is a perspective view of a corner protector as shown in Fig. 1 which is partially folded on the score line;
  • Fig. 3 is a perspective view of a sheet having protectors in accordance with this invention applied to all four corners of a sheet;
  • Fig. 4 illustrates an end elevation of a number of stacked sheets showing the way the protectors will rest upon each other spacing the corners of adjacent sheets apart and protecting them at the corners.
  • Metal sheets are frequently stacked forming aisles and passageways so that the corners are exposed not only for defacing engagement of the sheets, particularly at the corners, but also the sharp projecting edges particularly near the corners are likely to seriously cut the clothing of workmen and to seriously deface trunks and other articles which come in contact with them.
  • the present invention is designed and intended to provide a protector for the metal or other material to which it is applied and also to protect persons and objects which may brush against or come in contact with sharp sheets at and near the corners thereof.
  • this protector comprises a thin sheet 10 of paper, fiber, plastic, or other material adapted to be bent around and to be applied over the corner of a thin sheet 12 of any other material.
  • the protector is composed of paper which may be of the order of ten or fifteen thousandths 2,728,451 Patented Dec. 27, 1955 in thickness with one scuff resistant surface 14 which will resist abrasion and the other surface coated with a pressure sensitive adhesive 16.
  • the protector is preferably in the form of a right angle triangle having a score line 18 extending from the right angle normal to the opposite side, thus dividing the protector when folded upon the score line into two equal right angle triangles.
  • these protectors are preferably partially folded as shown in Fig. 2 upon the score line 18 which adapts them to be placed equally over opposite sides of the sheet 12 at the corner thereof, the folded portion of the protector being located over that portion of the edge which is most subject to contact due to the location of the sheets, the folded portion extending over one edge of the sheet as shown in the lower corner of Fig. 3 and over one end of the sheet as shown at the left corner of Fig. 3.
  • protectors may be supplied in adhesively connected stacks or they may be provided in strip form oppositely related to each other, partially severed and connected in rolls if desired. To remove the protector, it is necessary only to grasp and loosen one or both of the angular corners remote from the fold line and to strip it from the sheet on both sides thereof.
  • the pressure sensitive adhesive usually being composed of rubber or a rubber-like adhesive, does not mar, stick to or deface the sheet material and when the corner protector is removed, the sheet itself is ready for use without any further cleaning attention thereto. Although a scuff-proof paper with a presure sensitive rubberized adhesive is most desirable, other materials may be used for accomplishing the desired result.
  • a metal sheet and a corner protector therefor consisting of a triangular strip of paper-like material having a scuff-resistant surface at one side and a pressure sensitive adhesive entirely covering the other side, and a central fold line extending from one angle and normal to the opposite side thus dividing it into two triangular portions, the protector being folded on said fold line at a corner of the sheet over one edge thereof and the portions at the sides of the fold line adhering to opposite side faces of the sheet adjacent to and flush with the metal sheet at the corner thereof.

Description

Dec. 27, 1955 R. J. LEANDER METAL SHEET AND CORNER PROTECTOR Filed Sept. 12, 1951 INVENTOR. RUSSELL J LEANDER ATT'Y Unite l States Patent 1 2,728,451 METAL SHEET AND (IQRNER PROTECTDR Russell .l. Leander, Chicago, llL, assignor to Qliicago Show Printing Company, Chicago, 111., a corporation of Illinois Application September 12, 1951, Serial No. 246,197
1 Claim. (Cl. 206-60) This invention relates in general to a corner protector and is more particularly described as a corner protector for sheet metal such as thin sheet steel, copper, aluminum, and other metals or even sheets of paper, fiber, cardboard, and the like.
When sheet materials of these various kinds are stacked for storage or are handled for shipment, they may be easily bent, crumpled or damaged at the corner or corners, which results in a loss of time to straighten out the bent corner or any material to cut away the damaged portion.
The present invention provides an easily attachable thin angular protector which may be easily applied to a single corner or to all of the corners of a sheet of material for the purpose of protecting the material while it is being handled or when it is stacked or stored.
An important object of the invention is to provide a corner protector which may be quickly and easily applied to one or all of the corners of a sheet.
A further object of the invention is to provide a pressure sensitive adhesive on the protector so that it will adhere to any corner of sheet material to which it is applied and may be easily removed therefrom without damaging or defacing the corner or in applying or removing the protector.
A further object of the invention is to provide a foldable angular piece of sheet material which is scored so that it will fold over the opposite side faces of a sheet material at the corner thereof, the outer face of the protector being scufi-resistant and the inner face of the material having a pressure sensitive adhesive for causing it to adhere closely to both surfaces of the sheet to which it is applied.
Other objects of the invention will appear in the specification and will be apparent from the accompanying drawings in which,
Fig. l is a plan view of a corner protector in accordance with this invention showing the pressure adhesive side and the score line upon which it is foldable;
Fig. 2 is a perspective view of a corner protector as shown in Fig. 1 which is partially folded on the score line;
Fig. 3 is a perspective view of a sheet having protectors in accordance with this invention applied to all four corners of a sheet; and
Fig. 4 illustrates an end elevation of a number of stacked sheets showing the way the protectors will rest upon each other spacing the corners of adjacent sheets apart and protecting them at the corners.
Metal sheets are frequently stacked forming aisles and passageways so that the corners are exposed not only for defacing engagement of the sheets, particularly at the corners, but also the sharp projecting edges particularly near the corners are likely to seriously cut the clothing of workmen and to seriously deface trunks and other articles which come in contact with them.
The present invention is designed and intended to provide a protector for the metal or other material to which it is applied and also to protect persons and objects which may brush against or come in contact with sharp sheets at and near the corners thereof.
Referring now more particularly to the drawings, this protector comprises a thin sheet 10 of paper, fiber, plastic, or other material adapted to be bent around and to be applied over the corner of a thin sheet 12 of any other material. Preferably the protector is composed of paper which may be of the order of ten or fifteen thousandths 2,728,451 Patented Dec. 27, 1955 in thickness with one scuff resistant surface 14 which will resist abrasion and the other surface coated with a pressure sensitive adhesive 16.
The protector is preferably in the form of a right angle triangle having a score line 18 extending from the right angle normal to the opposite side, thus dividing the protector when folded upon the score line into two equal right angle triangles.
In applying these protectors to a sheet, they are preferably partially folded as shown in Fig. 2 upon the score line 18 which adapts them to be placed equally over opposite sides of the sheet 12 at the corner thereof, the folded portion of the protector being located over that portion of the edge which is most subject to contact due to the location of the sheets, the folded portion extending over one edge of the sheet as shown in the lower corner of Fig. 3 and over one end of the sheet as shown at the left corner of Fig. 3.
When these protectors are applied at the corners of a number of sheets which are in a stack, the sheets will be offset from each other double the thickness of the mate rial of the protector as shown more clearly in Fig. 4, particularly at the corners thereof. If the sheets are large in extent, the central portions may come flatly together in the central portions thereof, the protectors raising the corners as represented in Fig. 4.
These protectors may be supplied in adhesively connected stacks or they may be provided in strip form oppositely related to each other, partially severed and connected in rolls if desired. To remove the protector, it is necessary only to grasp and loosen one or both of the angular corners remote from the fold line and to strip it from the sheet on both sides thereof. The pressure sensitive adhesive usually being composed of rubber or a rubber-like adhesive, does not mar, stick to or deface the sheet material and when the corner protector is removed, the sheet itself is ready for use without any further cleaning attention thereto. Although a scuff-proof paper with a presure sensitive rubberized adhesive is most desirable, other materials may be used for accomplishing the desired result.
While a preferred embodiment of the invention has been described in some detail, it should be regarded as an illustration or example rather than as a limitation or restriction of the invention, since various changes in the construction, combination, and arrangement of the parts may be made without departing from the spirit and scope of the invention.
I claim:
The combination of a metal sheet and a corner protector therefor consisting of a triangular strip of paper-like material having a scuff-resistant surface at one side and a pressure sensitive adhesive entirely covering the other side, and a central fold line extending from one angle and normal to the opposite side thus dividing it into two triangular portions, the protector being folded on said fold line at a corner of the sheet over one edge thereof and the portions at the sides of the fold line adhering to opposite side faces of the sheet adjacent to and flush with the metal sheet at the corner thereof.
References Cited in the file of this patent UNITED STATES PATENTS 470,383 Lynch Mar. 8, 1892 1,256,818 Nile Feb. 19, 1918 1,672,113 Catherman June 5, 1928 1,760,564 Reynolds May 27, 1930 2,120,461 Copeman June 14, 1938 2,226,601 Euller Dec. 31, 1940 2,363,422 Hutchings Nov. 21, 1944 FOREIGN PATENTS 115,870 Australia Sept. 15, 1942
US246197A 1951-09-12 1951-09-12 Metal sheet and corner protector Expired - Lifetime US2728451A (en)

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Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1088423B (en) * 1956-11-08 1960-09-01 Juergen Walter Langheck Three-sided edge protection made of cardboard, corrugated cardboard, felt, textiles, plastic or the like
US3063885A (en) * 1958-02-17 1962-11-13 Thomas P Kieffer Packing pad
US3073439A (en) * 1959-11-30 1963-01-15 Buffalo Machinery Co Inc Corner protector
US4116334A (en) * 1976-06-10 1978-09-26 H. Goodman & Sons, Inc. Packaged articles
EP0089533A1 (en) * 1982-03-19 1983-09-28 Fr. Sander GmbH & Co. Stack of angle-formed corner protectors
US5056825A (en) * 1990-04-09 1991-10-15 Wallace Computer Services, Inc. Referencing device
US5212850A (en) * 1990-11-12 1993-05-25 In The Pocket Device for holding several leaves together
US5217256A (en) * 1992-05-26 1993-06-08 Lomas W P Paper stack protection device
US5272792A (en) * 1992-09-22 1993-12-28 Harper Matthew C Paper clip
US5533758A (en) * 1995-04-18 1996-07-09 Lee; Kenneth R. Book cover corner guard
US5570906A (en) * 1994-04-25 1996-11-05 Giulie; Joe D. Corner bind apparatus and method
US5626366A (en) * 1995-04-18 1997-05-06 Lee; Ken Book cover corner guard
US6012579A (en) * 1998-10-02 2000-01-11 Tindoll; Avalon Corner protector for flat material
US6070727A (en) * 1999-04-21 2000-06-06 Manufacturer's Equipment & Supply Company, Inc. Collapsible corner protector
US20080164278A1 (en) * 2003-01-10 2008-07-10 Martin Myerscough Fastening Device
US20130307395A1 (en) * 2012-05-15 2013-11-21 Leica Microsystems Cms Gmbh Slide storage assembly
US9016538B2 (en) 2004-07-21 2015-04-28 Charles Dale Ramsden Corner device and corner device attachment kit
US20180035829A1 (en) * 2016-08-08 2018-02-08 Armando Soto Methods and systems for a mounting tool
US20180118441A1 (en) * 2016-11-02 2018-05-03 Joseph Wycech Biodegradable packaging component
USD887179S1 (en) * 2017-03-24 2020-06-16 Christopher Charles Bundy Towel with detachable pocket
USD899144S1 (en) * 2018-03-05 2020-10-20 GHCL Limited Fitted sheet having expandable corner segments
US11295410B2 (en) 2019-04-12 2022-04-05 Rocket Innovations, Inc. Writing surface boundary markers for computer vision

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US470383A (en) * 1892-03-08 John h
US1256818A (en) * 1915-07-26 1918-02-19 Herbert J Nile Protective covering for glass panes.
US1672113A (en) * 1927-12-08 1928-06-05 Charles S Catherman Bookmark
US1760564A (en) * 1927-01-21 1930-05-27 Reynolds Lynus Clyde Sheet binder
US2120461A (en) * 1938-02-28 1938-06-14 Copeman Lab Co Method of protecting and forming prefinished metal
US2226601A (en) * 1939-09-27 1940-12-31 Hinde & Dauch Paper Co Protector
US2363422A (en) * 1942-07-06 1944-11-21 Bausch & Lomb Protecting light transmitting elements

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US470383A (en) * 1892-03-08 John h
US1256818A (en) * 1915-07-26 1918-02-19 Herbert J Nile Protective covering for glass panes.
US1760564A (en) * 1927-01-21 1930-05-27 Reynolds Lynus Clyde Sheet binder
US1672113A (en) * 1927-12-08 1928-06-05 Charles S Catherman Bookmark
US2120461A (en) * 1938-02-28 1938-06-14 Copeman Lab Co Method of protecting and forming prefinished metal
US2226601A (en) * 1939-09-27 1940-12-31 Hinde & Dauch Paper Co Protector
US2363422A (en) * 1942-07-06 1944-11-21 Bausch & Lomb Protecting light transmitting elements

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1088423B (en) * 1956-11-08 1960-09-01 Juergen Walter Langheck Three-sided edge protection made of cardboard, corrugated cardboard, felt, textiles, plastic or the like
US3063885A (en) * 1958-02-17 1962-11-13 Thomas P Kieffer Packing pad
US3073439A (en) * 1959-11-30 1963-01-15 Buffalo Machinery Co Inc Corner protector
US4116334A (en) * 1976-06-10 1978-09-26 H. Goodman & Sons, Inc. Packaged articles
EP0089533A1 (en) * 1982-03-19 1983-09-28 Fr. Sander GmbH & Co. Stack of angle-formed corner protectors
US5056825A (en) * 1990-04-09 1991-10-15 Wallace Computer Services, Inc. Referencing device
US5212850A (en) * 1990-11-12 1993-05-25 In The Pocket Device for holding several leaves together
US5217256A (en) * 1992-05-26 1993-06-08 Lomas W P Paper stack protection device
US5272792A (en) * 1992-09-22 1993-12-28 Harper Matthew C Paper clip
US5570906A (en) * 1994-04-25 1996-11-05 Giulie; Joe D. Corner bind apparatus and method
US5533758A (en) * 1995-04-18 1996-07-09 Lee; Kenneth R. Book cover corner guard
US5626366A (en) * 1995-04-18 1997-05-06 Lee; Ken Book cover corner guard
US6012579A (en) * 1998-10-02 2000-01-11 Tindoll; Avalon Corner protector for flat material
US6070727A (en) * 1999-04-21 2000-06-06 Manufacturer's Equipment & Supply Company, Inc. Collapsible corner protector
US6202848B1 (en) * 1999-04-21 2001-03-20 Manufacturer's Equipment & Supply Company, Inc. Collapsible corner protector
US20080164278A1 (en) * 2003-01-10 2008-07-10 Martin Myerscough Fastening Device
US9016538B2 (en) 2004-07-21 2015-04-28 Charles Dale Ramsden Corner device and corner device attachment kit
US20130307395A1 (en) * 2012-05-15 2013-11-21 Leica Microsystems Cms Gmbh Slide storage assembly
US20180035829A1 (en) * 2016-08-08 2018-02-08 Armando Soto Methods and systems for a mounting tool
US10595651B2 (en) * 2016-08-08 2020-03-24 De Soto Brands Methods and systems for a mounting tool
US20180118441A1 (en) * 2016-11-02 2018-05-03 Joseph Wycech Biodegradable packaging component
USD887179S1 (en) * 2017-03-24 2020-06-16 Christopher Charles Bundy Towel with detachable pocket
USD899144S1 (en) * 2018-03-05 2020-10-20 GHCL Limited Fitted sheet having expandable corner segments
US11295410B2 (en) 2019-04-12 2022-04-05 Rocket Innovations, Inc. Writing surface boundary markers for computer vision
US11908101B2 (en) 2019-04-12 2024-02-20 Rocket Innovations, Inc. Writing surface boundary markers for computer vision

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