ES482324A1 - Un metodo de fabricar un marco de una raqueta para juegos. - Google Patents
Un metodo de fabricar un marco de una raqueta para juegos.Info
- Publication number
- ES482324A1 ES482324A1 ES482324A ES482324A ES482324A1 ES 482324 A1 ES482324 A1 ES 482324A1 ES 482324 A ES482324 A ES 482324A ES 482324 A ES482324 A ES 482324A ES 482324 A1 ES482324 A1 ES 482324A1
- Authority
- ES
- Spain
- Prior art keywords
- moulding
- hollow
- support means
- reinforced
- construction
- 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.)
- Expired
Links
- 238000004519 manufacturing process Methods 0.000 title 1
- 238000000034 method Methods 0.000 abstract 4
- 238000010276 construction Methods 0.000 abstract 3
- 238000000465 moulding Methods 0.000 abstract 3
- 238000001746 injection moulding Methods 0.000 abstract 2
- 239000000463 material Substances 0.000 abstract 2
- 239000002990 reinforced plastic Substances 0.000 abstract 1
- 229920001169 thermoplastic Polymers 0.000 abstract 1
- 239000004416 thermosoftening plastic Substances 0.000 abstract 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
- A63B49/02—Frames
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/40—Removing or ejecting moulded articles
- B29C45/44—Removing or ejecting moulded articles for undercut articles
- B29C45/4457—Removing or ejecting moulded articles for undercut articles using fusible, soluble or destructible cores
-
- 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
- A63B49/10—Frames made of non-metallic materials, other than wood
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/44—Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles
- B29C33/52—Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles soluble or fusible
-
- 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
- A63B49/10—Frames made of non-metallic materials, other than wood
- A63B2049/103—Frames made of non-metallic materials, other than wood string holes produced during moulding process
-
- 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
- A63B49/10—Frames made of non-metallic materials, other than wood
- A63B49/11—Frames made of non-metallic materials, other than wood with inflatable tubes, e.g. inflatable during fabrication
-
- 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
- A63B60/50—Details or accessories of golf clubs, bats, rackets or the like with through-holes
-
- 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
- A63B60/54—Details or accessories of golf clubs, bats, rackets or the like with means for damping vibrations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/52—Sports equipment ; Games; Articles for amusement; Toys
- B29L2031/5245—Rackets
-
- 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
- Y10S273/00—Amusement devices: games
- Y10S273/23—High modulus filaments
Landscapes
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Physical Education & Sports Medicine (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Abstract
Un método de fabricar un marco para una raqueta para juegos, comprendiendo el marco una cabeza y una caña, por moldeo de un material termoplástico, caracterizado porque al menos la cabeza se forma inyectando el material termoplástico, caracterizado porque al menos la cabeza se forma inyectando el material termoplástico en torno a un macho fusible, teniendo el macho un punto de fusión por debajo de la temperatura de inyección y estando configurado de manera que proporcione unos medios de soporte internos entre la pared de la pieza moldeada que ha de quedar en la circunferencia exterior de la cabeza y la pared de la pieza moldeada que ha de quedar en la circunferencia interior de la cabeza, permitiendo que se endurezca la pieza moldeada y subiendo luego la temperatura hasta un valor suficiente para fundir el macho, pero insuficiente para fundir o deformar la pieza moldeada.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB892578 | 1978-03-07 |
Publications (1)
Publication Number | Publication Date |
---|---|
ES482324A1 true ES482324A1 (es) | 1980-10-01 |
Family
ID=9861977
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ES1979247142U Expired ES247142Y (es) | 1978-03-07 | 1979-03-06 | Un marco de raqueta para juegos 2. |
ES482324A Expired ES482324A1 (es) | 1978-03-07 | 1979-07-09 | Un metodo de fabricar un marco de una raqueta para juegos. |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ES1979247142U Expired ES247142Y (es) | 1978-03-07 | 1979-03-06 | Un marco de raqueta para juegos 2. |
Country Status (13)
Country | Link |
---|---|
US (2) | US4297308A (es) |
JP (1) | JPS5935632B2 (es) |
KR (1) | KR820001805B1 (es) |
AT (1) | AT381864B (es) |
AU (1) | AU521085B2 (es) |
BE (1) | BE874678A (es) |
CA (1) | CA1129453A (es) |
DE (1) | DE2908872C2 (es) |
ES (2) | ES247142Y (es) |
FR (1) | FR2419082A1 (es) |
NL (1) | NL173823C (es) |
SE (1) | SE439882B (es) |
ZA (1) | ZA791050B (es) |
Families Citing this family (51)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4338270A (en) * | 1979-06-11 | 1982-07-06 | `Totes`, Incorporated | Method of fabricating a composite foam hand held implement grip |
ATE1844T1 (de) * | 1979-08-24 | 1982-12-15 | Dunlop Limited | Verfahren zur herstellung eines schlaegerrahmens. |
EP0025126B1 (en) * | 1979-08-24 | 1983-03-09 | Dunlop Limited | Games racket frame |
DE3373783D1 (en) * | 1982-06-14 | 1987-10-29 | Cousin Freres Sa | Tennis racket frame and method of manufacturing it |
US4511523A (en) * | 1982-11-16 | 1985-04-16 | Joseph Hsu | Fabrication of a composite material racket frame |
US4690405A (en) * | 1983-10-19 | 1987-09-01 | Frolow Jack L | Tennis racket |
USRE33372E (en) * | 1983-10-19 | 1990-10-09 | Tennis racket | |
DE3416377A1 (de) * | 1983-12-05 | 1985-06-13 | Walter 7758 Meersburg Holzer | Tennisschlaeger aus u-foermig profilierten hohlprofilen |
US4614626A (en) * | 1984-04-27 | 1986-09-30 | Frerking James R | Method for fabricating a tennis racquet frame |
GB8418191D0 (en) * | 1984-07-17 | 1984-08-22 | Dunlop Ltd | Games racket |
DE8427999U1 (de) * | 1984-09-22 | 1987-03-26 | Kuebler, Siegfried, 7770 Überlingen | Schläger für Spiele mit begrenzt elastischem Ball |
GB8501006D0 (en) * | 1985-01-16 | 1985-02-20 | Dunlop Ltd | Games racket |
GB2172238B (en) * | 1985-03-12 | 1989-12-28 | Diversified Prod | Racquets |
JPS61164431U (es) * | 1985-04-01 | 1986-10-13 | ||
GB2175243A (en) * | 1985-05-21 | 1986-11-26 | Diversified Prod | Racquets |
JPH0429622Y2 (es) * | 1986-02-20 | 1992-07-17 | ||
USRE34420E (en) * | 1986-06-19 | 1993-10-26 | Darling James P | Sports racquet |
US4786055A (en) * | 1986-06-19 | 1988-11-22 | Darling James P | Sports racquet |
GB2195284B (en) * | 1986-09-17 | 1990-02-28 | Diversified Prod | Racquets |
US4768786A (en) * | 1986-10-17 | 1988-09-06 | Siegfried Kuebler | Tennis racket |
GB8706234D0 (en) * | 1987-03-17 | 1987-04-23 | Dunlop Ltd | Games racket |
US4938280A (en) * | 1988-11-07 | 1990-07-03 | Clark William E | Liquid-cooled, flat plate heat exchanger |
US5273597A (en) * | 1988-11-26 | 1993-12-28 | Honda Giken Kogyo Kabushiki Kaisha | Trim member for motor vehicle and method of and system for manufacturing the same |
AT399470B (de) * | 1988-12-15 | 1995-05-26 | Head Sport Ag | Verfahren zur herstellung eines ballspielschlägerrahmens |
US4903967A (en) * | 1989-01-27 | 1990-02-27 | Ferrari Importing Company, Inc. | Racket frame having holes for tailoring frame stiffness |
GB2231834A (en) * | 1989-05-27 | 1990-11-28 | Dunlop Ltd | Hollow elongate mouldings |
US5283020A (en) * | 1989-09-28 | 1994-02-01 | United Technologies Corporation | Component protection from contaminants |
JPH0687903B2 (ja) * | 1989-12-05 | 1994-11-09 | 住友ゴム工業株式会社 | テニスラケットフレーム |
US4997186A (en) * | 1989-12-08 | 1991-03-05 | Ferrari Importing Company, Inc. | Racket frame having multi-dimensional cross-sectional construction |
US5211396A (en) * | 1990-03-16 | 1993-05-18 | Ferrari Importing Company | Multi-frame racket |
US5005834A (en) * | 1990-03-16 | 1991-04-09 | Ferrari Importing Company | Multi-frame racket |
US5540434A (en) * | 1990-08-21 | 1996-07-30 | Wilson Sporting Goods Co. | Tennis racket |
US5176868A (en) * | 1991-01-24 | 1993-01-05 | Prince Manufacturing, Inc. | Long fiber reinforced thermoplastic frame especially for a tennis racquet |
US5242646A (en) * | 1992-05-07 | 1993-09-07 | Minnesota Mining And Manufacturing Company | Method of making an interengaging fastener member |
US5534213A (en) * | 1993-10-12 | 1996-07-09 | Epling; Marvin E. | Injection molded limb for compound bow |
US5922255A (en) * | 1997-04-04 | 1999-07-13 | Highlander Sports, Llc | Method of manufacturing a racket frame and throat |
US6132325A (en) * | 1997-06-25 | 2000-10-17 | Bertolotti; Fabio P | Interlocking string network for sport rackets |
US6506134B2 (en) | 1997-06-25 | 2003-01-14 | Fabio Paolo Bertolotti | Interlocking string network for sports rackets |
US6245265B1 (en) * | 1999-06-23 | 2001-06-12 | International Business Machines Corporation | Method of forming a die-castable hollow core actuator arm with improved damping |
US20060017197A1 (en) * | 2004-07-20 | 2006-01-26 | Christensen Donald J | Coring of compression-molded phenolic |
DE602006005900D1 (de) * | 2006-04-11 | 2009-05-07 | Prince Sports Inc | Verfahren zur Herstellung eines Sportschlägers |
DE102008064385B4 (de) * | 2008-12-22 | 2011-05-05 | Head Technology Gmbh | Ballspielschläger |
WO2011098031A1 (zh) * | 2010-02-11 | 2011-08-18 | Chen Jinxiang | 一体化制备多边形栅格蜂窝空芯与实芯功能板的模具与方法 |
US8734925B2 (en) | 2011-10-19 | 2014-05-27 | Hexcel Corporation | High pressure molding of composite parts |
US20140041977A1 (en) * | 2012-08-10 | 2014-02-13 | Wen-Chan Chang | Suitcase with Retractable Handle Assembly |
US9399155B2 (en) | 2012-11-27 | 2016-07-26 | Wilson Sporting Goods Co. | Optimized thermoplastic racquet |
US9192822B2 (en) | 2012-11-27 | 2015-11-24 | Wilson Sporting Goods Co. | Optimized thermoplastic racquet |
US9199135B2 (en) | 2012-11-27 | 2015-12-01 | Wilson Sporting Goods Co. | Optimized thermoplastic racquet |
US10391679B2 (en) * | 2016-07-22 | 2019-08-27 | Schlumberger Technology Corporation | Perforated membranes and methods of making the same |
CN108096802B (zh) * | 2018-01-17 | 2023-05-05 | 安徽三才体育用品有限公司 | 一种三段式羽毛球植毛架 |
US10751581B2 (en) | 2018-03-12 | 2020-08-25 | Wilson Sporting Goods Co. | Racquet configured with increased flexibility in multiple directions with respect to a longitudinal axis |
Family Cites Families (33)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1401567A (en) * | 1921-12-27 | Process and apparatus for manufacturing hollow rubber articles | ||
US1472202A (en) * | 1922-07-08 | 1923-10-30 | Spalding & Bros Ag | Tennis racket |
DK54682C (da) * | 1934-03-21 | 1938-05-02 | Denes Von Mihaly | Apparat til kontinuerlig Nedskrivning og Gengivelse af fotografiske Lyd- og Tonestriber. |
GB773971A (en) * | 1951-07-25 | 1957-05-01 | John Frederick Patrick Smith | Process for moulding so-called "plastic" materials |
DE1692615U (de) * | 1954-09-23 | 1955-02-03 | Artur Zoebl | Vollplastik-federballschlaeger. |
GB828685A (en) * | 1955-10-04 | 1960-02-24 | Cole E K Ltd | Improvements relating to the moulding of thermoplastic articles |
DE1748534U (de) * | 1957-02-20 | 1957-07-11 | Bernard R Friedrichs | Tennis-schlaeger, vorzugsweise fuer federball-spiel, aus kunststoff. |
DE1893026U (de) * | 1963-12-09 | 1964-05-14 | Georg Brohm | Schlaeger fuer tischtennis oder aehnliche ballspiele |
DE1604528A1 (de) * | 1966-06-16 | 1970-11-12 | Bayer Ag | Formkern zur Herstellung von Hohlkoerpern aller Art |
US3625512A (en) * | 1968-01-26 | 1971-12-07 | Peter A Latham | Extruded racket having two seamless hollow tubes formed with an interconnecting web |
US3809402A (en) * | 1969-01-02 | 1974-05-07 | Dunlop Holdings Ltd | Tennis rackets and frames therefor |
DE6908641U (de) * | 1969-02-24 | 1969-06-26 | Tech Akustik Gmbh & Co | Tennisschlaeger |
US3664668A (en) * | 1970-04-03 | 1972-05-23 | Franklin W Held | Racketball or tennis racket having a tubular metal frame |
FR2098838A5 (es) * | 1970-07-29 | 1972-03-10 | Robin Jacques | |
US3892831A (en) * | 1970-07-29 | 1975-07-01 | Jacques Andre Robin | Method of manufacture of tennis rackets of reinforced synthetic material |
US3752478A (en) * | 1971-03-26 | 1973-08-14 | Questar Corp | Racket frame |
GB1362116A (en) * | 1971-04-27 | 1974-07-30 | Callenelle Usines | Sports rackets |
US3882220A (en) * | 1971-08-23 | 1975-05-06 | Ryder Int Corp | Method of molding utilizing meltable core |
CH530249A (de) * | 1971-10-22 | 1972-11-15 | Liechti Fritz Dipl Ing Dr | Verfahren zur Herstellung von Formteilen aus Kunststoffen mit komplizierten Aussparungen und Hohlräumen |
ATA493572A (de) * | 1972-06-08 | 1975-04-15 | Fischer Gmbh | Ballschlager und verfahren zu seiner herstellung |
IT975226B (it) * | 1972-06-20 | 1974-07-20 | Kicherer K | Procedimento per la fabbricazione di racchette da tennis |
FR2270908A1 (en) * | 1973-12-19 | 1975-12-12 | Martel Rene | Moulded resin tennis racket frame - has hollow interfitting string-receiving bosses in two U-section head elements |
US3981504A (en) * | 1974-03-18 | 1976-09-21 | Ppg Industries, Inc. | Glass-carbon reinforced foamed resin tennis racket frame |
FR2270909A1 (en) * | 1974-05-16 | 1975-12-12 | Barbafieri Gerard | Stabiliser fixing device for gymnastic apparatus - is L-shaped with anchoring pin and shock absorber block |
FR2276845A1 (fr) * | 1974-07-05 | 1976-01-30 | Martel Rene | Cadre de raquette et raquette comportant un tel cadre |
US3998457A (en) * | 1974-12-20 | 1976-12-21 | Pepsico, Inc. | Tennis racket |
FR2311644A1 (fr) * | 1975-05-21 | 1976-12-17 | Guillemin Jean Pierre | Procede de moulage en creux dans une resine thermodurcissante transparente et produit moule obtenu |
US4165071A (en) * | 1976-01-05 | 1979-08-21 | Frolow Jack L | Tennis racket |
JPS52146329A (en) * | 1976-05-27 | 1977-12-06 | Nippon Gakki Seizo Kk | Racket frame |
DE2631345A1 (de) * | 1976-07-13 | 1978-01-26 | Bosch Gmbh Robert | Tennisschlaeger in verbundbauweise und verfahren zu seiner herstellung |
JPS5412930A (en) * | 1977-06-30 | 1979-01-31 | Hitachi Chem Co Ltd | Racket frame |
JPS5416240A (en) * | 1977-07-07 | 1979-02-06 | Hitachi Chem Co Ltd | Racket frame |
JPS5450582A (en) * | 1977-09-30 | 1979-04-20 | Nippon Carbon Co Ltd | Fiber reinforced plastic molded article |
-
1979
- 1979-02-28 US US06/015,912 patent/US4297308A/en not_active Expired - Lifetime
- 1979-03-01 CA CA322,587A patent/CA1129453A/en not_active Expired
- 1979-03-02 SE SE7901921A patent/SE439882B/sv not_active IP Right Cessation
- 1979-03-06 KR KR7900675A patent/KR820001805B1/ko active
- 1979-03-06 ZA ZA791050A patent/ZA791050B/xx unknown
- 1979-03-06 ES ES1979247142U patent/ES247142Y/es not_active Expired
- 1979-03-06 NL NLAANVRAGE7901765,A patent/NL173823C/xx not_active IP Right Cessation
- 1979-03-06 AU AU44828/79A patent/AU521085B2/en not_active Expired
- 1979-03-07 BE BE0/193891A patent/BE874678A/xx not_active IP Right Cessation
- 1979-03-07 AT AT0171179A patent/AT381864B/de not_active IP Right Cessation
- 1979-03-07 JP JP54026609A patent/JPS5935632B2/ja not_active Expired
- 1979-03-07 FR FR7905842A patent/FR2419082A1/fr active Granted
- 1979-03-07 DE DE2908872A patent/DE2908872C2/de not_active Expired
- 1979-07-09 ES ES482324A patent/ES482324A1/es not_active Expired
-
1981
- 1981-01-29 US US06/229,506 patent/US4440392A/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
AU521085B2 (en) | 1982-03-18 |
ES247142Y (es) | 1982-04-16 |
SE7901921L (sv) | 1979-09-08 |
JPS5935632B2 (ja) | 1984-08-29 |
NL173823C (nl) | 1984-03-16 |
NL7901765A (nl) | 1979-09-11 |
JPS54127735A (en) | 1979-10-03 |
US4440392A (en) | 1984-04-03 |
NL173823B (nl) | 1983-10-17 |
FR2419082A1 (fr) | 1979-10-05 |
DE2908872A1 (de) | 1980-01-31 |
ATA171179A (de) | 1986-05-15 |
KR820001805B1 (ko) | 1982-10-12 |
AT381864B (de) | 1986-12-10 |
DE2908872C2 (de) | 1985-01-03 |
ES247142U (es) | 1981-10-16 |
US4297308A (en) | 1981-10-27 |
FR2419082B1 (es) | 1981-09-18 |
CA1129453A (en) | 1982-08-10 |
AU4482879A (en) | 1979-09-13 |
ZA791050B (en) | 1980-04-30 |
SE439882B (sv) | 1985-07-08 |
BE874678A (fr) | 1979-07-02 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
FD1A | Patent lapsed |
Effective date: 19970519 |