AU654413B2 - Badminton racket - Google Patents
Badminton racket Download PDFInfo
- Publication number
- AU654413B2 AU654413B2 AU29693/92A AU2969392A AU654413B2 AU 654413 B2 AU654413 B2 AU 654413B2 AU 29693/92 A AU29693/92 A AU 29693/92A AU 2969392 A AU2969392 A AU 2969392A AU 654413 B2 AU654413 B2 AU 654413B2
- Authority
- AU
- Australia
- 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.)
- Ceased
Links
- 230000005484 gravity Effects 0.000 claims abstract description 17
- 238000009527 percussion Methods 0.000 claims description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 229910002804 graphite Inorganic materials 0.000 description 3
- 239000010439 graphite Substances 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 235000009854 Cucurbita moschata Nutrition 0.000 description 2
- 240000001980 Cucurbita pepo Species 0.000 description 2
- 235000009852 Cucurbita pepo Nutrition 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 235000020354 squash Nutrition 0.000 description 2
- BXESZVNFNSBGGR-UHFFFAOYSA-N 3-(2,3-dimethoxyphenyl)-1-(9-methyl-2-phenyl-9H-imidazo[1,2-a]benzimidazol-3-yl)prop-2-en-1-one Chemical compound COC1=CC=CC(C=CC(=O)C=2N3C4=CC=CC=C4N(C)C3=NC=2C=2C=CC=CC=2)=C1OC BXESZVNFNSBGGR-UHFFFAOYSA-N 0.000 description 1
- 101100289061 Drosophila melanogaster lili gene Proteins 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 230000002860 competitive effect Effects 0.000 description 1
- 239000010985 leather Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
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
-
- 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
- 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
Landscapes
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Physical Education & Sports Medicine (AREA)
- Pulmonology (AREA)
- Golf Clubs (AREA)
- Steroid Compounds (AREA)
- Carbon And Carbon Compounds (AREA)
- Saccharide Compounds (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
A badminton racket (20) has a frame (21) with a head portion (22), a throat portion (23), and a shaft portion (24) which terminates in a handle portion (25). The racket (20) is lighter than prior badminton rackets, and the balance point or center of gravity of the racket is closer to the head end (33) than the handle end (30). <IMAGE>
Description
I
I
P/00/011 Regulation 3.2 654
AUSTRALIA
PATENTS ACT 1990 COMPLETE SPECIFICATION FOR A STANDARD PATENT
ORIGINAL
TO BE COMPLETED BY APPLICANT Name of Applicant: WILSON SPORTING GOODS CO.
Actual Inventor(s): Po-Jen CHENG Address for Service: CALLINAN LAWRIE, 278 High Street, Kew, 3101, Victoria, Australia Invention Title: "BADMINTON RACKET" The following statement is a full description of this invention, including the best method of performing it known to me:- -I I I I~ ll ll-llmllllIi...""" 1 11 1 .a I' BADMINTON RACKET BACKGROUND OF THE INVENTION Field Of The Invention 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.
0 S* Description Of The Prior Art 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 Length Balance lend S(Grams) (Inches _nc hes) (oz. in.
2 1 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 I LILI u 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," 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 di2?erent than a tennis racket in S shape, weight, and other physical characteristics.
Strauch et al. U.S. Patent No. 5,062,634 describes a i "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 Sracket.
SUMMARY OF THE INVENTION 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 gaet 75 to 85 grams, and preferably within the range of abeutto 85 grams. The length of the racket is abeat 26 inches, and the balance point or center of gravity is abeet 13.4 to 15.2 2 i i inches from the handle end. The moment of inertia about an axis at the end of the handle is within the range of a bea 700 to 780 oz. in.
2 and preferably within the range of -abeet 730 to 765 oz. in.
2 and the center of percussion is-abt- 18.7 to 20.5 inches from the handle end of the racket.
BRIEF DESCRIPTION OF THE DRAWINGS 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: rr cr ~r t c raer r rr r -r rr It. it I i (r t: FIG. 1 is a plan formed in accordance with FIG. 2 is a side view of a badminton racket frame the invention; elevational view of the racket frame; FIG. 3 is a sectional view taken along the line 3-3 of FIG. 1.; It
A.
FIG. 1; FIG. 1; FIG. 4 is a sectional view taken along the line 4-4 of FIG. 5 is a sectional view taken along the line 5-5 of FIG. 6 is a sectional view taken along the line 6-6 of FIG. 7 is a sectional view taken along the line 7-7 of FIG. 8 is a sectional view taken along the line 8-8 of FIG. 1; FIG. 1; FIG. 1; 3 ;I ill IBIP LIC~ 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 ,r 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, t€¢C t• 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.
DETAILED DESCRIPTION OF THE DRAWINGS AND EMBODIMENTS Referring to FIGS. 1 and 2, 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 -4end, 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 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.
f The racket has a conventional butt cap 29 mounted on the butt end 30 of the handle portion 25. It also includes aflexible 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).
Preferably, the frame comprises molded graphite fibers and resin, although other materials may also form the frame, e.cr., 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 I_ I 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 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 i axis G-G is from 160 to 220 oz. in.
2 SThe center of percussion of a racket is the point at which a ball striking a freely suspended racket will cause the i 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 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. When measuring the center of percussion with respect Sto an axis which lies parallel to the axis G-G but 3 inches from the butt end 30, the center of percussion is 17.4 inches from that axis toward the head end 33.
6- 6 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.
.o FIGS. 3-14 illustrate the height H and width W of the o o cross section of the frame at Sections 3-3 through 12-12, o S respectively. The height and width of the cross sections vary S along the length of the frame as shown in FIG. 2. The height H o 0and width W of the cross sections of one example of the racket appear below in Table I.
TABLE I oe Cross Height Width Section Linch (inch) 3-3 0.433 0.195 o 4-4 0.494 0.235 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.
7 C 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 incl ,e the assembly of the frame and the guaY4 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 t a' invention is not limited to this embodiment. Those skilled in the art to which the invention pertains may make modifications o a a and other embodiments employing the principles of this invention particularly upon considering the foregoing teachings. For example, rather than having the butper 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.
a a: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.
I claim: 8
Claims (4)
1. 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 abeut 75 to -aHeya grams, and b) a center of gravity located closer to the head end of the racket than the handle end of the racket. S2. 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 4bet- 13.4 to abe~et-15.2 inches from the handle cnd of the racket.
3. The badminton racket of claim 1 in which the center of percussion measured from the handle end is abetbe- 18.7 to 20.5 inches from the handle end.
4. 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 abemt-26 inches, the improvement characterized by the racket having: a) a weight within the range of abet 75 to 85 grams, b) a center of gravity located abeuf-13.4 to abeut
15.2 inches from the handle end of the racket; c) a center of percussion measured from the handle end 9 L ii .i mu-7lr-l-- -rrar -r~ of about 18.7 to 20.5 inches from the han,' end; and d) a moment of inertia about an axis at the handle end which extends perpendicularly to the handle of abeut 700 to aaboe 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 -abe4- 75 to abeut grams, b) a center of gravity located closer to the head end of the racket than the handle end of the racket, and c) a moment of inertia about an axis at the handle end which extends perpendicularly to the handle is abot 700 to -abow 780 oz. in. 2 6. The badminton racket of claim 5 in which the center of percussion measured from the handle end is abeut 18.7 to 20.5 inches from the handle end. 7. 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 10 r i I- 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 ,a~et- 75 to ahewit- grams, and b) a center of gravity located closer to the head end of the racket than the handle end of the racket. I I V V 8. 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 abeut 13.4 to abte 15.2 inches from the handle end of the racket. 9. A badminton racket, substantially as described herein with reference to the accompanying drawings. DATED this 27th day of November 1992 t WILSON SPORTING GOODS CO. by their Patent Attorneys CALLINAN LAWRIE 11 A TE ABSTRACT A badminton racket with a frame (21) having a head portion (22) for supporting a strung surface, a handle portion (25) for holding by a player, and a shaft portion (24) connected to the handle portion (25) and to the head portion the racket having a weight of between 75 and 85 grams, and a center of gravity located closer to the head end of the racket than the handle end of the racket. Lk
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 |
---|---|
AU2969392A AU2969392A (en) | 1993-06-03 |
AU654413B2 true AU654413B2 (en) | 1994-11-03 |
Family
ID=25178812
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AU29693/92A Ceased AU654413B2 (en) | 1991-11-27 | 1992-11-27 | 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 (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4291574A (en) * | 1976-01-05 | 1981-09-29 | Frolow Jack L | Tennis racket |
US5062634A (en) * | 1990-08-31 | 1991-11-05 | Wilson Sporting Goods Co. | Squash racket |
US5071124A (en) * | 1990-05-03 | 1991-12-10 | Prince Manufacturing, Inc | Badminton racquet |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
USRE31419E (en) * | 1976-01-05 | 1983-10-18 | Tennis racket | |
GB2188848B (en) * | 1986-04-12 | 1989-11-29 | Lo Kun Nan | An improved badminton racket |
-
1992
- 1992-11-25 DE DE69205948T patent/DE69205948T2/en not_active Expired - Fee Related
- 1992-11-25 CA CA002083738A patent/CA2083738A1/en not_active Abandoned
- 1992-11-25 NZ NZ245261A patent/NZ245261A/en unknown
- 1992-11-25 EP EP92120069A patent/EP0544248B1/en not_active Expired - Lifetime
- 1992-11-25 AT AT92120069T patent/ATE129913T1/en not_active IP Right Cessation
- 1992-11-25 DK DK92120069.7T patent/DK0544248T3/en active
- 1992-11-27 JP JP4318058A patent/JP2501277B2/en not_active Expired - Lifetime
- 1992-11-27 KR KR1019920022545A patent/KR970006234B1/en active IP Right Grant
- 1992-11-27 AU AU29693/92A patent/AU654413B2/en not_active Ceased
-
1996
- 1996-07-11 HK HK122596A patent/HK122596A/en not_active IP Right Cessation
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4291574A (en) * | 1976-01-05 | 1981-09-29 | Frolow Jack L | Tennis racket |
US5071124A (en) * | 1990-05-03 | 1991-12-10 | Prince Manufacturing, Inc | Badminton racquet |
US5062634A (en) * | 1990-08-31 | 1991-11-05 | Wilson Sporting Goods Co. | Squash racket |
Also Published As
Publication number | Publication date |
---|---|
EP0544248A1 (en) | 1993-06-02 |
JP2501277B2 (en) | 1996-05-29 |
ATE129913T1 (en) | 1995-11-15 |
AU2969392A (en) | 1993-06-03 |
KR970006234B1 (en) | 1997-04-25 |
EP0544248B1 (en) | 1995-11-08 |
DK0544248T3 (en) | 1995-12-11 |
HK122596A (en) | 1996-07-19 |
CA2083738A1 (en) | 1993-05-28 |
KR930009620A (en) | 1993-06-21 |
DE69205948D1 (en) | 1995-12-14 |
JPH0671001A (en) | 1994-03-15 |
NZ245261A (en) | 1994-12-22 |
DE69205948T2 (en) | 1996-06-27 |
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