WO2002090209A1 - Packaging system - Google Patents

Packaging system Download PDF

Info

Publication number
WO2002090209A1
WO2002090209A1 PCT/AU2002/000561 AU0200561W WO02090209A1 WO 2002090209 A1 WO2002090209 A1 WO 2002090209A1 AU 0200561 W AU0200561 W AU 0200561W WO 02090209 A1 WO02090209 A1 WO 02090209A1
Authority
WO
WIPO (PCT)
Prior art keywords
packaging system
body parts
item
body part
packaging
Prior art date
Application number
PCT/AU2002/000561
Other languages
French (fr)
Inventor
Angus Mcdonald
Vincent Iaconis
Original Assignee
Australian Postal Corporation
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 Australian Postal Corporation filed Critical Australian Postal Corporation
Priority to AU2002252823A priority Critical patent/AU2002252823B2/en
Priority to NZ527353A priority patent/NZ527353A/en
Publication of WO2002090209A1 publication Critical patent/WO2002090209A1/en

Links

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
    • B65D43/00—Lids or covers for rigid or semi-rigid containers
    • B65D43/14—Non-removable lids or covers
    • B65D43/16—Non-removable lids or covers hinged for upward or downward movement
    • B65D43/162—Non-removable lids or covers hinged for upward or downward movement the container, the lid and the hinge being made of one piece

Definitions

  • the invention relates to a packaging system. More particularly the present invention relates to a packaging system suitable for postage of fragile items such as bottles.
  • Packaging is generally necessary to protect the posted item from rough handling, accidental dropping and buffeting during transport in a vehicle, aircraft or boat. Packaging is also necessary to protect posted items from being crushed by other heavier items.
  • Packaging also provides a medium for applying address or delivery details and protects the contents from tampering.
  • the present invention therefore provides a packaging system suitable for postage of fragile items, the packaging system having;
  • the first and second body parts can be manually locked together using the locking system, so as to encase an item, the release system being operable to provide access to the encased item.
  • the two body parts are of identical shape and configuration.
  • the two body parts may be separate, and able to be held together by virtue of the locking system.
  • the two body parts may be integral, and for example, in a hinged relationship. In this embodiment the body parts may be moved about the hinge to bring the body parts into sufficiently close proximity to manually lock the locking system.
  • the body parts may be of any convenient shape appropriate to the item being enclosed therein.
  • the body parts may be generally, hemi-cylindrical in shape, of dimensions slightly longer and wider than the wine bottle.
  • the inner surface of the body parts includes one or more, preferably a series of ribs or struts such that in use, the ribs or struts are adjacent the packaged item to restrain it moving and being damaged within the package.
  • the ribs or struts may have the additional function of providing support or strength to the package system.
  • the inner surface of the body parts may have padding or filling.
  • the ribs, struts and/or padding may be integral with the body part or may be in the form of inserto.
  • the inner form of the body parts may be conformed to fit the general shape of the part of the packaged item that it contacts in use. This is of particular advantage for more fragile items such as wine bottles.
  • the inner surface of each of the body part can be conformed to fit exactly to the shape of half of a champagne bottle, or a red wine bottle or a white wine bottle.
  • the present invention further provides a locking system suitable for packaging, the locking system comprises one or more teeth which can be manually inserted into one or more recesses, such that the tooth or teeth is/are securely held within the recess(es) and cannot be manually released.
  • the recess may be defined by material that is resiliently deformable upon insertion of the teeth.
  • each body part includes a series of teeth and a series of recesses, such that the teeth of one body part can be received in the recesses of another body part.
  • one body part may include one or more teeth, and the other may include one or more complementary shaped recesses. This embodiment is particularly preferred when the two body parts are in a hinged relationship.
  • the teeth and recesses are located at the edges defining the body parts.
  • the release system is independent of the locking system.
  • the release system includes a removable portion of the first and/or second body part.
  • the release system includes a tearaway or cutaway portion, such as a strip incorporated in the first body part and/or the second body part. When a first 11118705vl body part and second body part are locked together, the strip can be torn away to allow access to the item previously encased inside.
  • a tearaway strip will include a tab or ring-pull that facilitates tearing.
  • the removable portion such as a tearaway or cutaway strip is defined by a series of perforations or other features that form a weakened portion in the body part that can be readily cut or torn.
  • the removable portion is thinner than the surrounding portion of the body part.
  • the release system cannot be manually released, one must use the release system to access the item encased between the body parts. Where the release system includes a tearaway or cutaway strip, this may effectively destroy the packaging, making it unsuitable for re-use. In this embodiment, the release system is in effect a tamper evident closure, because any attempt to access the item in the packaging will be readily apparent.
  • the body parts are formed of a plastic or polymer, by injection molding, blow molding or other common manufacturing technique. Pulped paper on cardboard would also be suitable materials of construction. Typically the body parts are formed of a recyclable material. Recyclable material is particularly preferred if the packaging cannot be re-used.
  • the packaging system may include further body parts such that a number of items may be encased, each of the items remaining out of contact with any of the other items.
  • two or more bottles of wine may be encased such that the bottles cannot collide and break.
  • first and second body parts are locked together and encase a first bottle of wine and third and forth body parts are locked together and encase a second bottle of wine.
  • the third and forth body parts may be associated with a second non- releasable locking system and/or a second independent release system.
  • the first and third, and second and forth body parts may be integral, joined for example by a hinge. Alternatively they may be joined by a locking system.
  • the packaging system of the present invention may thus be extended by addition of further body parts such that in use multiple items may be encased such that none of the items encased contacts any other encased item.
  • Figure 1 is a perspective view of a packaging system according to one form of the invention.
  • Figure 2 is a further perspective view of the packaging system as shown in Figure 1, viewed in the direction AA'.
  • Figure 3 is a side view of the packaging system as shown in Figure 2, viewed in the direction BB'.
  • Figure 4 is an end view of the packaging system as shown in Figure 3, viewed in the direction CC ⁇
  • Figure 1 clearly shows two generally hemi-cylindrical body parts 1, 2 joined by a hinge 5.
  • the body parts 1,2 and hinge 5 are all formed by a single polymer injection molding process, the thickness of the hinge being slightly less than the thickness of the two body parts so that they readily move about the hinge.
  • the mold used in the molding process can be readily adapted to impart an identifier 7 such as a trademark.
  • the inside surface of each body part includes a series of ribs designed to restrain movement of an item encased between the first and second body parts.
  • the first body part 1 includes a set of teeth 10a, 10b, 10c, and a set of recesses 12d, 12e, 12f which may engage the corresponding recesses 12a, 12b, 12c and teeth lOd, lOe, lOf on the second body part 2 to lock together the two body parts.
  • Figure 2 shows the reverse of the first body part 1 and second body part 2 in greater detail.
  • the second body part 2 includes a panel 18 on which details can be written, such as postal directions, delivery instructions and a delivery address.
  • the first body part 1 also includes a flat, generally rectangular face 20 which includes a series of small perforations, running in two lines 22a, 22b and define a strips 21a, 21b running parallel to the longitudinal axis of the body part each strip ending in a pull ring 23.
  • a knife, scissors or other cutting device may be run along the perforations to effectively cleave open the body portion.
  • the perforations are sufficiently large, or the polymer is sufficiently soft or thin, it may be possible to manually tear away the strip defined by the perforations using force on the pull ring 23.
  • the pull ring can be protected from accidentally being pulled or having force applied by being tucked into the recess in the opposite body part.
  • Figure 3 shows the unlocked package of Figure 2 from a different angle, with a shaded outline of a wine bottle included to show how this type of item would fit between the 2 body parts.
  • Figure 4 shows one end of the packaging system including a tooth lOd and corresponding recess I4d.
  • This tooth and recess combination may be include at both ends of the packaging system, only one end, or neither as appropriate.

Abstract

A packaging system suitable for postage of fragile items, the packaging system having: (a) first (1) and second (2) body parts; (b) a non-releasable locking (10 and 12, a to f) system for locking together the first and second body parts, and (c) a release system independent of the locking system (21 and 23), wherein in use, the first and second body parts can be manually locked together using the locking system, so as to encase an item, the release system being operable to provide access to the encased item.

Description

Packaging System
Field of the invention
The invention relates to a packaging system. More particularly the present invention relates to a packaging system suitable for postage of fragile items such as bottles.
Background of the invention
In this specification, where a document, act or item of knowledge is referred to or discussed, this reference or discussion is not an admission that the document, act or item of knowledge or any combination thereof was at the priority date:
(i) part of common general knowledge; or
(ii) known to be relevant to an attempt to solve any problem with which this specification is concerned.
Whilst the following discussion concerns packaging suitable for bottles of wine, it is to be understood that the same principles apply to other items, fragile or non-fragile. Furthermore, whilst the discussion herein concerns packaging suitable for carriage by postal services, the invention is not limited to this use, and it will be readily apparent that the packaging can be used for other applications such as storage.
Packaging is generally necessary to protect the posted item from rough handling, accidental dropping and buffeting during transport in a vehicle, aircraft or boat. Packaging is also necessary to protect posted items from being crushed by other heavier items.
Packaging also provides a medium for applying address or delivery details and protects the contents from tampering.
Clearly, the more fragile the item, the greater the possibility of breakage or damage, and the greater the protection which must be provided by the packaging.
Many people rely on household commodities such as newspaper, brown paper, cardboard boxes, bubble wrap, string and sticky tape to package items prior to postage. These household commodities have the advantage of being inexpensive, but often provide inadequate protection. If large quantities of these household
11118705vl commodities are used to provide protection, this invariably results in the package being very heavy, incurring high postage and handling costs.
There is also a wide range of commercially manufactured packages and packaging materials specially designed for carriage of items by postal service but these can be relatively expensive. Typical commercially manufactured packages for bottle transport are described in EP 0712789 and comprise at least two half-shells made from recycled paper, having deformations which positively grip the bottles therein. US 2,020,454, US 5,816,409 and US 5,335,770 disclose molded pulp packaging for bottles comprising half shells having bottle shaped recesses.
Object of the invention
It is an object of the present invention to provide a novel packaging system that is relatively inexpensive, yet sufficiently robust to protect a fragile item such as a wine bottle, and is suitable for carriage by postal services.
Summary of the invention
The present invention therefore provides a packaging system suitable for postage of fragile items, the packaging system having;
(a) first and second body parts;
(b) a non-releasable locking system for locking together the first and second body parts, and
(c) a release system independent of the locking system,
wherein in use, the first and second body parts can be manually locked together using the locking system, so as to encase an item, the release system being operable to provide access to the encased item.
According to a preferred form of the invention, the two body parts are of identical shape and configuration. The two body parts may be separate, and able to be held together by virtue of the locking system. Alternatively, the two body parts may be integral, and for example, in a hinged relationship. In this embodiment the body parts may be moved about the hinge to bring the body parts into sufficiently close proximity to manually lock the locking system.
11118705vl The body parts may be of any convenient shape appropriate to the item being enclosed therein. For example, if the item is a wine bottle, the body parts may be generally, hemi-cylindrical in shape, of dimensions slightly longer and wider than the wine bottle.
Preferably, the inner surface of the body parts, that is, the surface closest the packaged item, includes one or more, preferably a series of ribs or struts such that in use, the ribs or struts are adjacent the packaged item to restrain it moving and being damaged within the package. The ribs or struts may have the additional function of providing support or strength to the package system. Alternatively or in addition, the inner surface of the body parts may have padding or filling. The ribs, struts and/or padding may be integral with the body part or may be in the form of inserto. The inner form of the body parts, (whether they consist of ribs, struts, padding, filling or some other structure) may be conformed to fit the general shape of the part of the packaged item that it contacts in use. This is of particular advantage for more fragile items such as wine bottles. For example, the inner surface of each of the body part can be conformed to fit exactly to the shape of half of a champagne bottle, or a red wine bottle or a white wine bottle.
The present invention further provides a locking system suitable for packaging, the locking system comprises one or more teeth which can be manually inserted into one or more recesses, such that the tooth or teeth is/are securely held within the recess(es) and cannot be manually released. The recess may be defined by material that is resiliently deformable upon insertion of the teeth. In a particularly preferred embodiment, each body part includes a series of teeth and a series of recesses, such that the teeth of one body part can be received in the recesses of another body part. Alternatively, one body part may include one or more teeth, and the other may include one or more complementary shaped recesses. This embodiment is particularly preferred when the two body parts are in a hinged relationship.
Typically the teeth and recesses are located at the edges defining the body parts. The release system is independent of the locking system. Typically the release system includes a removable portion of the first and/or second body part. In a preferred embodiment the release system includes a tearaway or cutaway portion, such as a strip incorporated in the first body part and/or the second body part. When a first 11118705vl body part and second body part are locked together, the strip can be torn away to allow access to the item previously encased inside. Typically a tearaway strip will include a tab or ring-pull that facilitates tearing. In a preferred embodiment the removable portion such as a tearaway or cutaway strip is defined by a series of perforations or other features that form a weakened portion in the body part that can be readily cut or torn. Alternatively, or in addition, the removable portion is thinner than the surrounding portion of the body part.
Because the locking system cannot be manually released, one must use the release system to access the item encased between the body parts. Where the release system includes a tearaway or cutaway strip, this may effectively destroy the packaging, making it unsuitable for re-use. In this embodiment, the release system is in effect a tamper evident closure, because any attempt to access the item in the packaging will be readily apparent.
In a preferred embodiment, the body parts are formed of a plastic or polymer, by injection molding, blow molding or other common manufacturing technique. Pulped paper on cardboard would also be suitable materials of construction. Typically the body parts are formed of a recyclable material. Recyclable material is particularly preferred if the packaging cannot be re-used.
In a preferred embodiment, the packaging system may include further body parts such that a number of items may be encased, each of the items remaining out of contact with any of the other items. For example, two or more bottles of wine may be encased such that the bottles cannot collide and break. In one embodiment, first and second body parts are locked together and encase a first bottle of wine and third and forth body parts are locked together and encase a second bottle of wine. Optionally, the third and forth body parts may be associated with a second non- releasable locking system and/or a second independent release system. The first and third, and second and forth body parts may be integral, joined for example by a hinge. Alternatively they may be joined by a locking system. The packaging system of the present invention may thus be extended by addition of further body parts such that in use multiple items may be encased such that none of the items encased contacts any other encased item.
11118705vl Description of the drawings
The invention will now be further explained and illustrated by reference to the accompanying drawings in which:
Figure 1 is a perspective view of a packaging system according to one form of the invention; and
Figure 2 is a further perspective view of the packaging system as shown in Figure 1, viewed in the direction AA'.
Figure 3 is a side view of the packaging system as shown in Figure 2, viewed in the direction BB'.
Figure 4 is an end view of the packaging system as shown in Figure 3, viewed in the direction CC\
Figure 1 clearly shows two generally hemi-cylindrical body parts 1, 2 joined by a hinge 5. The body parts 1,2 and hinge 5 are all formed by a single polymer injection molding process, the thickness of the hinge being slightly less than the thickness of the two body parts so that they readily move about the hinge. The mold used in the molding process can be readily adapted to impart an identifier 7 such as a trademark. The inside surface of each body part includes a series of ribs designed to restrain movement of an item encased between the first and second body parts. The first body part 1 includes a set of teeth 10a, 10b, 10c, and a set of recesses 12d, 12e, 12f which may engage the corresponding recesses 12a, 12b, 12c and teeth lOd, lOe, lOf on the second body part 2 to lock together the two body parts.
Figure 2 shows the reverse of the first body part 1 and second body part 2 in greater detail. The second body part 2 includes a panel 18 on which details can be written, such as postal directions, delivery instructions and a delivery address. The first body part 1 also includes a flat, generally rectangular face 20 which includes a series of small perforations, running in two lines 22a, 22b and define a strips 21a, 21b running parallel to the longitudinal axis of the body part each strip ending in a pull ring 23. A knife, scissors or other cutting device may be run along the perforations to effectively cleave open the body portion. When the two body parts are locked together, this provides an effective release system for providing access to an item
11118705vl encased between the body parts. If the perforations are sufficiently large, or the polymer is sufficiently soft or thin, it may be possible to manually tear away the strip defined by the perforations using force on the pull ring 23. The pull ring can be protected from accidentally being pulled or having force applied by being tucked into the recess in the opposite body part.
Figure 3 shows the unlocked package of Figure 2 from a different angle, with a shaded outline of a wine bottle included to show how this type of item would fit between the 2 body parts.
Figure 4 shows one end of the packaging system including a tooth lOd and corresponding recess I4d. This tooth and recess combination may be include at both ends of the packaging system, only one end, or neither as appropriate.
The word 'comprising' and forms of the word 'comprising' as used in this description does not limit the invention claimed to exclude any variants or additions.
Modifications and improvements to the invention will be readily apparent to those skilled in the art. Such modifications and improvements are intended to be within the scope of this invention.
11118705vl

Claims

The claims defining the invention are as follows:
1. A packaging system suitable for postage of fragile items, the packaging system having:
(a) first and second body parts;
(b) a non-releasable locking system for locking together the first and second body parts, and
(c) a release system independent of the locking system,
wherein in use, the first and second body parts can be manually locked together using the locking system, so as to encase an item, the release system being operable to provide access to the encased item.
2. A packaging system according to claim 1 wherein the first and second body parts are of identical shape and configuration.
3. A packaging system according to claim 1 or claim 2 wherein the first and second body parts are non-integral.
4. A packaging system according to claim 1 or claim 2 wherein the first and second body parts are integral.
5. A packaging system according to claim 4 wherein the first and second body parts are in a hinged relationship, the body parts being moveable about the hinge to bring the body parts into sufficiently close proximity that the locking system can be locked.
6. A packaging system according to any one of the preceding claims wherein the inner surface of at least one of the body parts includes one or more ribs or struts such that in use, the one or more ribs or struts are adjacent the packaged item and restrain the item from moving.
7. A packaging system according to any one of the preceding claims wherein the inner surface of at least one of the body parts includes padding such that in use, the padding is adjacent the packaged item and restrains the item from moving.
11118705vl
8. A packaging system according to claim 6 wherein the ribs or struts are integral with the inner surface of at least one of the body parts.
9. A packaging system according to claim 7 wherein the padding is integral with the surface of at least one of the body parts.
10. A packaging system according to any one of the preceding claims wherein in use the inner surface of each of the body parts conforms to the shape of the part of the item it contacts.
11. A packaging system according to claim 10 wherein the inner surface of each of the body parts conforms to the shape of half a wine bottle.
12. A packaging system according to any one of the preceding claims wherein the locking system includes one or more teeth that can be manually inserted into one or more recesses, such that the one or more teeth is/are held within the one or more recesses and cannot be manually released.
13. A packaging system according to claim 12 wherein the shape of the recesses is complimentary to the shape of the teeth.
14. A packaging system according to claim 12 or 13 wherein each body part includes one or more teeth and one or more recesses, such that the teeth of one body part may be receivable in the recesses of the other body part.
15. A packaging system according to claim 12 or 13 wherein one body part includes one or more teeth and the other body part includes one or more recesses.
16. A packaging system according to any one of claims 12 to 15 wherein the first and second body parts are in a hinged relationship and the one or more teeth and one or more recesses are located at the edges defining the body parts.
17. A packaging system according to any one of the preceding claims wherein the release system includes a portion of the first body part.
18. A packaging system according to claim 17 wherein the release system includes a portion of the first body part and a portion of the second body part, wherein both portions must be removed to provide access to the encased item.
11118705vl
19- A packaging system according to any one of claims 1 to 16 wherein the release system includes a portion of the first body part which can be severed to provide access to the encased item.
20. A packaging system according to any one of the preceding claims wherein the release system includes a portion of the first body part and a portion of the second body part, wherein both portions must be severed to provide access to the encased item.
21. A packaging system according to any one of claims 1 to 16 wherein the release system includes a strip incorporated in the first body part that can be removed to provide access to the encased item.
22. A packaging system according to claim 21 wherein the release system includes a strip incorporated in both the first and second body parts that can be removed to provide access to the encased item.
23. A packaging system according to claim 21 or 22 wherein the strip is defined by a weakened portion of the body part, the weakened portion being readily torn or cut to remove the strip.
24. A packaging system according to any of the preceding claims wherein the first and second body portions are constructed from material chosen from the group consisting of polymers, pulped paper, pulped cardboard or mixtures thereof.
25. A packaging system according to any of the previous claims which comprises third and forth body parts wherein in use the first and second body parts encase a first item and the third and forth body parts encase a second item such the two items are not in contact.
26. A packaging system according to claim 25 which includes a second non- releasable locking system for locking together the third and forth body parts.
27. A packaging system according to claim 25 or 26 which includes a further non- releasable locking system for locking together the first and third body parts.
28. A packaging system according to claim 25 which includes a second independent release system
11118705vl
29. A packaging system according to any one of claims 25 to 27 wherein the first and third body parts are integral and the second and forth body parts are integral.
30. A packaging system according to any of the preceding claims which includes further body parts such that in use, multiple items may be encased such that the items cannot come into physical contact.
31. A packaging system according to claim 1 and as herein described with reference to the drawings.
PCT/AU2002/000561 2001-05-07 2002-05-06 Packaging system WO2002090209A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU2002252823A AU2002252823B2 (en) 2001-05-07 2002-05-06 Packaging system
NZ527353A NZ527353A (en) 2001-05-07 2002-05-06 Packaging system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AUPR4801 2001-05-07
AUPR004801 2001-05-07

Publications (1)

Publication Number Publication Date
WO2002090209A1 true WO2002090209A1 (en) 2002-11-14

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PCT/AU2002/000561 WO2002090209A1 (en) 2001-05-07 2002-05-06 Packaging system

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WO (1) WO2002090209A1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010053140A1 (en) 2008-11-05 2010-05-14 国立大学法人 東京医科歯科大学 Hyaluronic acid derivative and pharmaceutical composition thereof
WO2014038641A1 (en) 2012-09-05 2014-03-13 中外製薬株式会社 Hyaluronic acid derivative having amino acid and steryl group introduced thereinto
JP5717304B1 (en) * 2014-01-14 2015-05-13 株式会社バンダイ container
WO2019098393A1 (en) 2017-11-15 2019-05-23 中外製薬株式会社 Hyaluronic acid derivative modified with poly(ethylene glycol)
US11383887B2 (en) 2017-03-07 2022-07-12 Eco.Logic Brands Inc. System and method for connecting multi-part container with inter-connecting features

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0344966B1 (en) * 1988-05-31 1992-09-30 Pro-Tech-Tube, Inc. Protective enclosure for hazardous material primary containers

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0344966B1 (en) * 1988-05-31 1992-09-30 Pro-Tech-Tube, Inc. Protective enclosure for hazardous material primary containers

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010053140A1 (en) 2008-11-05 2010-05-14 国立大学法人 東京医科歯科大学 Hyaluronic acid derivative and pharmaceutical composition thereof
WO2014038641A1 (en) 2012-09-05 2014-03-13 中外製薬株式会社 Hyaluronic acid derivative having amino acid and steryl group introduced thereinto
JP5717304B1 (en) * 2014-01-14 2015-05-13 株式会社バンダイ container
CN104680648A (en) * 2014-01-14 2015-06-03 万代股份有限公司 Container
TWI561444B (en) * 2014-01-14 2016-12-11 Bandai Co
US11383887B2 (en) 2017-03-07 2022-07-12 Eco.Logic Brands Inc. System and method for connecting multi-part container with inter-connecting features
US11932451B2 (en) 2017-03-07 2024-03-19 Eco.Logic Brands Inc. System and method for connecting multi-part container with inter-connecting features
WO2019098393A1 (en) 2017-11-15 2019-05-23 中外製薬株式会社 Hyaluronic acid derivative modified with poly(ethylene glycol)

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