EP0544248A1 - Badminton racket - Google Patents
Badminton racket Download PDFInfo
- Publication number
- EP0544248A1 EP0544248A1 EP92120069A EP92120069A EP0544248A1 EP 0544248 A1 EP0544248 A1 EP 0544248A1 EP 92120069 A EP92120069 A EP 92120069A EP 92120069 A EP92120069 A EP 92120069A EP 0544248 A1 EP0544248 A1 EP 0544248A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- racket
- handle
- inches
- center
- head
- Prior art date
- 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.)
- Granted
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Classifications
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B49/00—Stringed rackets, e.g. for tennis
- A63B49/02—Frames
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B49/00—Stringed rackets, e.g. for tennis
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B49/00—Stringed rackets, e.g. for tennis
- A63B49/02—Frames
- A63B49/03—Frames characterised by throat sections, i.e. sections or elements between the head and the shaft
- A63B49/032—T-shaped connection elements
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B49/00—Stringed rackets, e.g. for tennis
- A63B49/02—Frames
- A63B2049/0201—Frames with defined head dimensions
- A63B2049/0203—Frames with defined head dimensions height
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B49/00—Stringed rackets, e.g. for tennis
- A63B49/02—Frames
- A63B2049/0201—Frames with defined head dimensions
- A63B2049/0204—Frames with defined head dimensions width
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B49/00—Stringed rackets, e.g. for tennis
- A63B49/02—Frames
- A63B2049/0207—Frames with defined overall length
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B49/00—Stringed rackets, e.g. for tennis
- A63B49/02—Frames
- A63B2049/0211—Frames with variable thickness of the head in a direction perpendicular to the string plane
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B49/00—Stringed rackets, e.g. for tennis
- A63B49/02—Frames
- A63B2049/0212—Frames with defined weight
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B49/00—Stringed rackets, e.g. for tennis
- A63B49/02—Frames
- A63B2049/0217—Frames with variable thickness of the head in the string plane
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B2102/00—Application of clubs, bats, rackets or the like to the sporting activity ; particular sports involving the use of balls and clubs, bats, rackets, or the like
- A63B2102/04—Badminton
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B60/00—Details or accessories of golf clubs, bats, rackets or the like
- A63B60/06—Handles
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B60/00—Details or accessories of golf clubs, bats, rackets or the like
- A63B60/06—Handles
- A63B60/08—Handles characterised by the material
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B60/00—Details or accessories of golf clubs, bats, rackets or the like
- A63B60/06—Handles
- A63B60/10—Handles with means for indicating correct holding positions
Definitions
- This invention relates to badminton rackets, and, more particularly, to a badminton racket which is lighter than prior badminton rackets and which has a balance point or center of gravity closer to the head end of the racket than to the handle end.
- Badminton rackets conventionally have a length of about 26 inches and a weight of about 100 grams. The balance point or center of gravity of those rackets lies closer to the handle end of the racket than the head end. Accordingly, the prior badminton rackets are "head light.” They typically include lead or other weight in the handle to increase the weight of the racket and to produce the "head light" characteristic.
- Weight (Grams) Length (Inches) Balance (Inches) Iend (oz. in.2) 95 to 115 25.98 to 26.23 11.34 to 12.60 707 to 826
- Weight is the distance of the balance point or center of gravity from the handle end of the racket.
- Iend is the moment of inertia about an axis at the end of the handle which extends perpendicularly to the handle and is a measure of the ability of the racket to resist rotation about the axis.
- Frolow Reissue U.S. Patent No. 31,419 describes a tennis racket which weighs less than conventional tennis rackets. Weight, removed from the handle end and added to the head end, makes the racket "head heavy," i.e. , the balance point or center of gravity lies closer to the head end of the racket than the handle end. Frolow does not describe a badminton racket, which is distinctly different than a tennis racket in shape, weight, and other physical characteristics.
- Strauch et al. U.S. Patent No. 5,062,634 describes a "head heavy" squash racket.
- the racket is light and has a balance point or center of gravity closer to the head than the handle.
- Strauch et al. do not describe a badminton racket which has distinctly different physical characteristics than a squash racket.
- the invention provides a badminton racket which is significantly lighter than prior badminton rackets and which is "head heavy.”
- the weight of the racket is within the range of about 75 to 85 grams, and preferably within the range of about 80 to 85 grams.
- the length of the racket is about 26 inches, and the balance point or center of gravity is about 13.4 to 15.2 inches from the handle end.
- the moment of inertia about an axis at the end of the handle is within the range of about 700 to 780 oz. in.2, and preferably within the range of about 730 to 765 oz. in.2, and the center of percussion is about 18.7 to 20.5 inches from the handle end of the racket.
- the numeral 20 designates a badminton racket of the present invention.
- This racket has a frame 21 which includes a hoop-shaped head portion 22 at one end, a generally T-shaped throat portion 23, and an elongated shaft portion 24 at the other, opposite end.
- the shaft portion terminates in a handle portion 25.
- the head portion supports conventional string 26 with longitudinal and transverse portions which provide a conventional strung surface.
- the outer surface of the head portion 22 has a groove 27 (See FIGS. 3 and 4) to accommodate the cross-over portions of the strings; and drilled openings 28 in the head portion 22, through which the string extends, help define a pattern for the string.
- the racket has a conventional butt cap 29 mounted on the butt end 30 of the handle portion 25. It also includes a flexible strip of leather or synthetic material 31 (See FIG. 14) spirally wound around the handle portion to provide a hand grip. Finally, it includes a bumper guard 32 which lies in the groove 27 and includes eyelets sized to fit into the openings 28.
- the guard 32 is a nylon member, or a member made out of any other suitable material.
- the racket string 26 extends through its eyelets and secures it in place (See FIGS. 1-3).
- the frame comprises molded graphite fibers and resin, although other materials may also form the frame, e.g. , aluminum, graphite reinforced aluminum, polymers, fiber reinforced metals, etc.
- the frame's shape and cross section make it lighter than conventional badminton racket frames and head heavy.
- the particular racket illustrated in FIGS. 1 and 2 has a weight within the range of about 75 to 85 grams, and preferably within the range of about 80 to 85 grams.
- the overall length L of the racket is 26 inches, and the balance point or center of gravity is 13.4 to 15.2 inches from the butt end 30 of the racket.
- the end moment of inertia of the racket about an axis G-G is from 700 to 780 oz. in.2, and preferably from 730 to 765 oz. in.2.
- the axis G-G extends perpendicularly to the handle portion 25 at the butt end 30.
- the moment of inertia about an axis Y-Y, lying perpendicularly of the axis G-G along the center of the racket and extending through the center of gravity, is from 9 to 12 oz. in.2.
- the moment of inertia about an axis X-X, extending through the balance point or center of gravity and lying parallel to the axis G-G is from 160 to 220 oz. in.2.
- the center of percussion of a racket is the point at which a ball striking a freely suspended racket will cause the racket to rotate about the axis G-G without moving the axis G-G.
- Prior badminton rackets generally have a center of percussion less than 18.54 inches from an axis at the butt end 30.
- the racket illustrated in FIGS. 1 and 2 has its center of percussion at 18.90 inches from the butt end 30 when measuring the center of percussion with respect to the axis G-G at the butt end.
- the center of percussion is 17.4 inches from that axis toward the head end 33.
- the following parameters further define the configuration of the racket of the present invention which includes a generally oval head.
- the longitudinal dimension A of the strung surface which is the inside dimension of the head portion, is 9.32 inches. This dimension may be within the range of 9.3 to 11.0 inches.
- the transverse dimension B of the strung surface is 7.24 inches. This dimension may be within the range of 7.0 to 8.6 inches.
- the length D of the handle portion 25 is 5.16 inches.
- FIGS. 3-14 illustrate the height H and width W of the cross section of the frame at Sections 3-3 through 12-12, respectively.
- the height and width of the cross sections vary along the length of the frame as shown in FIG. 2.
- the height H and width W of the cross sections of one example of the racket appear below in Table I.
- One forms the racket of the present invention using conventional fabrication methods. They include forming the frame by laying graphite fibers and resin around an elongated inflatable bladder, arranging the bladder in the shape of the frame, curing the resin under heat and pressure, and deflating the bladder and removing it to provide a hollow frame. Subsequent steps include the assembly of the frame and the guard and handle components and the stringing of the racket.
- the badminton racket of the present invention may include a frame with a thicker portion at the head end 33 to increase the weight on the head side of the racket and help provide the "head heavy" feature.
Abstract
Description
- This invention relates to badminton rackets, and, more particularly, to a badminton racket which is lighter than prior badminton rackets and which has a balance point or center of gravity closer to the head end of the racket than to the handle end.
- Badminton rackets conventionally have a length of about 26 inches and a weight of about 100 grams. The balance point or center of gravity of those rackets lies closer to the handle end of the racket than the head end. Accordingly, the prior badminton rackets are "head light." They typically include lead or other weight in the handle to increase the weight of the racket and to produce the "head light" characteristic.
- Representative competitive badminton rackets have the following physical properties:
Weight (Grams) Length (Inches) Balance (Inches) Iend (oz. in.²) 95 to 115 25.98 to 26.23 11.34 to 12.60 707 to 826
"Balance" is the distance of the balance point or center of gravity from the handle end of the racket. "Iend" is the moment of inertia about an axis at the end of the handle which extends perpendicularly to the handle and is a measure of the ability of the racket to resist rotation about the axis. - Frolow Reissue U.S. Patent No. 31,419 describes a tennis racket which weighs less than conventional tennis rackets. Weight, removed from the handle end and added to the head end, makes the racket "head heavy," i.e., the balance point or center of gravity lies closer to the head end of the racket than the handle end. Frolow does not describe a badminton racket, which is distinctly different than a tennis racket in shape, weight, and other physical characteristics.
- Strauch et al. U.S. Patent No. 5,062,634 describes a "head heavy" squash racket. The racket is light and has a balance point or center of gravity closer to the head than the handle. Strauch et al. do not describe a badminton racket which has distinctly different physical characteristics than a squash racket.
- The invention provides a badminton racket which is significantly lighter than prior badminton rackets and which is "head heavy." The weight of the racket is within the range of about 75 to 85 grams, and preferably within the range of about 80 to 85 grams. The length of the racket is about 26 inches, and the balance point or center of gravity is about 13.4 to 15.2 inches from the handle end. The moment of inertia about an axis at the end of the handle is within the range of about 700 to 780 oz. in.², and preferably within the range of about 730 to 765 oz. in.², and the center of percussion is about 18.7 to 20.5 inches from the handle end of the racket.
- For a more complete understanding of this invention one should now refer to the embodiment illustrated in greater detail in the accompanying drawings and described below by way of an example of the invention. In the drawings:
- FIG. 1 is a plan view of a badminton racket frame formed in accordance with the invention;
- FIG. 2 is a side elevational view of the racket frame;
- FIG. 3 is a sectional view taken along the line 3-3 of FIG. 1.;
- FIG. 4 is a sectional view taken along the line 4-4 of FIG. 1;
- FIG. 5 is a sectional view taken along the line 5-5 of FIG. 1;
- FIG. 6 is a sectional view taken along the line 6-6 of FIG. 1;
- FIG. 7 is a sectional view taken along the line 7-7 of FIG. 1;
- FIG. 8 is a sectional view taken along the line 8-8 of FIG. 1;
- FIG. 9 is a sectional view taken along the line 9-9 of FIG. 1;
- FIG. 10 is a sectional view taken along the line 10-10 of FIG. 1;
- FIG. 11 is a sectional view taken along the line 11-11 of FIG. 1;
- FIG. 12 is a sectional view taken along the line 12-12 of FIG. 1;
- FIG. 13 is a sectional view taken along the line 13-13 of FIG. 1; and
- FIG. 14 is a sectional view taken along the line 14-14 of FIG. 1.
- While the following disclosure describes the invention in connection with one embodiment, one should understand that the invention is not limited to this embodiment. Furthermore, one should understand that the drawings are not to scale and that graphic symbols, diagrammatic representations, and fragmentary views, in part, illustrate the embodiment. In certain instances, the disclosure may not include details which are not necessary for an understanding of the present invention.
- Referring to FIGS. 1 and 2, the
numeral 20 designates a badminton racket of the present invention. This racket has aframe 21 which includes a hoop-shaped head portion 22 at one end, a generally T-shaped throat portion 23, and anelongated shaft portion 24 at the other, opposite end. The shaft portion terminates in ahandle portion 25. - The head portion supports
conventional string 26 with longitudinal and transverse portions which provide a conventional strung surface. The outer surface of thehead portion 22 has a groove 27 (See FIGS. 3 and 4) to accommodate the cross-over portions of the strings; and drilledopenings 28 in thehead portion 22, through which the string extends, help define a pattern for the string. - The racket has a
conventional butt cap 29 mounted on thebutt end 30 of thehandle portion 25. It also includes a flexible strip of leather or synthetic material 31 (See FIG. 14) spirally wound around the handle portion to provide a hand grip. Finally, it includes abumper guard 32 which lies in thegroove 27 and includes eyelets sized to fit into theopenings 28. Theguard 32 is a nylon member, or a member made out of any other suitable material. Theracket string 26 extends through its eyelets and secures it in place (See FIGS. 1-3). - Preferably, the frame comprises molded graphite fibers and resin, although other materials may also form the frame, e.g., aluminum, graphite reinforced aluminum, polymers, fiber reinforced metals, etc. The frame's shape and cross section make it lighter than conventional badminton racket frames and head heavy.
- The particular racket illustrated in FIGS. 1 and 2 has a weight within the range of about 75 to 85 grams, and preferably within the range of about 80 to 85 grams. The overall length L of the racket is 26 inches, and the balance point or center of gravity is 13.4 to 15.2 inches from the
butt end 30 of the racket. The end moment of inertia of the racket about an axis G-G is from 700 to 780 oz. in.², and preferably from 730 to 765 oz. in.². The axis G-G extends perpendicularly to thehandle portion 25 at thebutt end 30. The moment of inertia about an axis Y-Y, lying perpendicularly of the axis G-G along the center of the racket and extending through the center of gravity, is from 9 to 12 oz. in.². The moment of inertia about an axis X-X, extending through the balance point or center of gravity and lying parallel to the axis G-G is from 160 to 220 oz. in.². - The center of percussion of a racket is the point at which a ball striking a freely suspended racket will cause the racket to rotate about the axis G-G without moving the axis G-G. Prior badminton rackets generally have a center of percussion less than 18.54 inches from an axis at the
butt end 30. The racket illustrated in FIGS. 1 and 2 has its center of percussion at 18.90 inches from thebutt end 30 when measuring the center of percussion with respect to the axis G-G at the butt end. When measuring the center of percussion with respect to an axis which lies parallel to the axis G-G but 3 inches from thebutt end 30, the center of percussion is 17.4 inches from that axis toward thehead end 33. - The following parameters further define the configuration of the racket of the present invention which includes a generally oval head. The longitudinal dimension A of the strung surface, which is the inside dimension of the head portion, is 9.32 inches. This dimension may be within the range of 9.3 to 11.0 inches. The transverse dimension B of the strung surface is 7.24 inches. This dimension may be within the range of 7.0 to 8.6 inches. The length D of the
handle portion 25 is 5.16 inches. - FIGS. 3-14 illustrate the height H and width W of the cross section of the frame at Sections 3-3 through 12-12, respectively. The height and width of the cross sections vary along the length of the frame as shown in FIG. 2. The height H and width W of the cross sections of one example of the racket appear below in Table I.
TABLE I Cross Section Height (inch) Width (inch) 3-3 0.433 0.195 4-4 0.494 0.235 5-5 0.542 0.268 6-6 0.551 - 7-7 0.486 0.414 8-8 0.315 (Diameter) - 9-9 0.394 (Diameter) - 10-10 0.504 0.512 11-11 0.906 0.925 12-12 0.827 0.846
The height and width of sections 13-13 and 14-14 varies based on the size handle of the racket. The height of the frame at these sections varies between 0.827 to 1.043 inches and the width varies between 0.906 to 1.000 inches. As shown in FIGS. 3-12, the racket frame is hollow. - One forms the racket of the present invention using conventional fabrication methods. They include forming the frame by laying graphite fibers and resin around an elongated inflatable bladder, arranging the bladder in the shape of the frame, curing the resin under heat and pressure, and deflating the bladder and removing it to provide a hollow frame. Subsequent steps include the assembly of the frame and the guard and handle components and the stringing of the racket.
- While the above description and the drawings illustrate one embodiment, one should understand, of course, that the invention is not limited to this embodiment. Those skilled in the art to which the invention pertains may make modifications and other embodiments employing the principles of this invention particularly upon considering the foregoing teachings. For example, rather than having the bumper guard described above, the badminton racket of the present invention may include a frame with a thicker portion at the
head end 33 to increase the weight on the head side of the racket and help provide the "head heavy" feature. - The applicant, therefore, by the appended claims, intends to cover any modifications and other embodiments as incorporate those features which constitute the essential features of this invention.
Claims (8)
- An improved badminton racket with a frame having a head portion for supporting a strung surface, a handle portion for holding by a player, a shaft portion connected to the handle portion and to the head portion, the improvement comprising the racket having:a) a weight within the range of about 75 to about 85 grams, andb) a center of gravity located closer to the head end of the racket than the handle end of the racket.
- The badminton racket of claim 1 in which the length of the racket is about 26 inches and the center of gravity of the racket is about 13.4 to about 15.2 inches from the handle end of the racket.
- The badminton racket of claim 1 in which the center of percussion measured from the handle end is about 18.7 to 20.5 inches from the handle end.
- A badminton racket comprising a frame having a head portion for supporting a strung surface, a handle portion for holding by a player, a shaft portion connected to the handle portion and to the head portion, the overall length of the racket being about 26 inches, the improvement characterized by the racket having:a) a weight within the range of about 75 to 85 grams,b) a center of gravity located about 13.4 to about 15.2 inches from the handle end of the racket;c) a center of percussion measured from the handle end of about 18.7 to 20.5 inches from the handle end; andd) a moment of inertia about an axis at the handle end which extends perpendicularly to the handle of about 700 to about 780 oz. in.².
- A badminton racket comprising a frame having a head portion adapted to support a strung surface, a handle portion adapted to be held by a player, a shaft portion connected to the handle portion, and a throat portion connecting the handle portion and the head portion, the improvement characterized by the racket having:a) a weight within the range of about 75 to about 85 grams,b) a center of gravity located closer to the head end of the racket than the handle end of the racket, andc) a moment of inertia about an axis at the handle end which extends perpendicularly to the handle is about 700 to about 780 oz. in.².
- The badminton racket of claim 5 in which the center of percussion measured from the handle end is about 18.7 to 20.5 inches from the handle end.
- A badminton racket comprising a frame having a head portion adapted to support a strung surface, a handle portion adapted to be held by a player, a shaft portion connected to the handle portion, and a throat portion connecting the handle portion and the head portion, the head portion adapted to provide a strung surface having a longitudinal dimension parallel to the shaft portion of less than 11.0 inches and a transverse dimension perpendicular to the shaft portion of less than 8.6 inches, the improvement characterized by a racket having:a) a weight within the range of about 75 to about 85 grams, andb) a center of gravity located closer to the head end of the racket than the handle end of the racket.
- The badminton racket of claim 7 in which the length of the racket is about 26 inches and the center of gravity of the racket is about 13.4 to about 15.2 inches from the handle end of the racket.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US80059391A | 1991-11-27 | 1991-11-27 | |
US800593 | 1991-11-27 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0544248A1 true EP0544248A1 (en) | 1993-06-02 |
EP0544248B1 EP0544248B1 (en) | 1995-11-08 |
Family
ID=25178812
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP92120069A Expired - Lifetime EP0544248B1 (en) | 1991-11-27 | 1992-11-25 | Badminton racket |
Country Status (10)
Country | Link |
---|---|
EP (1) | EP0544248B1 (en) |
JP (1) | JP2501277B2 (en) |
KR (1) | KR970006234B1 (en) |
AT (1) | ATE129913T1 (en) |
AU (1) | AU654413B2 (en) |
CA (1) | CA2083738A1 (en) |
DE (1) | DE69205948T2 (en) |
DK (1) | DK0544248T3 (en) |
HK (1) | HK122596A (en) |
NZ (1) | NZ245261A (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2015008890A (en) * | 2013-06-28 | 2015-01-19 | 美津濃株式会社 | Badminton racket frame |
KR101910343B1 (en) * | 2017-06-27 | 2018-10-22 | 박정숙 | Badminton racket |
JP7085399B2 (en) | 2018-04-27 | 2022-06-16 | ヨネックス株式会社 | Badminton racket |
JP7424096B2 (en) * | 2020-02-18 | 2024-01-30 | 住友ゴム工業株式会社 | badminton racket |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
USRE31419E (en) * | 1976-01-05 | 1983-10-18 | Tennis racket | |
GB2188848A (en) * | 1986-04-12 | 1987-10-14 | Lo Kun Nan | Badminton racket |
US5062634A (en) * | 1990-08-31 | 1991-11-05 | Wilson Sporting Goods Co. | Squash racket |
EP0456407A1 (en) * | 1990-05-03 | 1991-11-13 | Prince Sports Group, Inc. | Badminton racquet |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4291574A (en) * | 1976-01-05 | 1981-09-29 | Frolow Jack L | Tennis racket |
-
1992
- 1992-11-25 DK DK92120069.7T patent/DK0544248T3/en active
- 1992-11-25 AT AT92120069T patent/ATE129913T1/en not_active IP Right Cessation
- 1992-11-25 DE DE69205948T patent/DE69205948T2/en not_active Expired - Fee Related
- 1992-11-25 NZ NZ245261A patent/NZ245261A/en unknown
- 1992-11-25 CA CA002083738A patent/CA2083738A1/en not_active Abandoned
- 1992-11-25 EP EP92120069A patent/EP0544248B1/en not_active Expired - Lifetime
- 1992-11-27 JP JP4318058A patent/JP2501277B2/en not_active Expired - Lifetime
- 1992-11-27 AU AU29693/92A patent/AU654413B2/en not_active Ceased
- 1992-11-27 KR KR1019920022545A patent/KR970006234B1/en active IP Right Grant
-
1996
- 1996-07-11 HK HK122596A patent/HK122596A/en not_active IP Right Cessation
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
USRE31419E (en) * | 1976-01-05 | 1983-10-18 | Tennis racket | |
GB2188848A (en) * | 1986-04-12 | 1987-10-14 | Lo Kun Nan | Badminton racket |
EP0456407A1 (en) * | 1990-05-03 | 1991-11-13 | Prince Sports Group, Inc. | Badminton racquet |
US5062634A (en) * | 1990-08-31 | 1991-11-05 | Wilson Sporting Goods Co. | Squash racket |
Also Published As
Publication number | Publication date |
---|---|
CA2083738A1 (en) | 1993-05-28 |
DE69205948T2 (en) | 1996-06-27 |
AU654413B2 (en) | 1994-11-03 |
ATE129913T1 (en) | 1995-11-15 |
KR930009620A (en) | 1993-06-21 |
DE69205948D1 (en) | 1995-12-14 |
JP2501277B2 (en) | 1996-05-29 |
AU2969392A (en) | 1993-06-03 |
HK122596A (en) | 1996-07-19 |
EP0544248B1 (en) | 1995-11-08 |
KR970006234B1 (en) | 1997-04-25 |
DK0544248T3 (en) | 1995-12-11 |
JPH0671001A (en) | 1994-03-15 |
NZ245261A (en) | 1994-12-22 |
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