WO1995020466A1 - System for the grinding of spectacle lens - Google Patents
System for the grinding of spectacle lens Download PDFInfo
- Publication number
- WO1995020466A1 WO1995020466A1 PCT/DE1995/000116 DE9500116W WO9520466A1 WO 1995020466 A1 WO1995020466 A1 WO 1995020466A1 DE 9500116 W DE9500116 W DE 9500116W WO 9520466 A1 WO9520466 A1 WO 9520466A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- processing
- blank
- plant according
- station
- workpiece carrier
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B13/00—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor
- B24B13/005—Blocking means, chucks or the like; Alignment devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B9/00—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor
- B24B9/02—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground
- B24B9/06—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain
- B24B9/08—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain of glass
- B24B9/14—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain of glass of optical work, e.g. lenses, prisms
- B24B9/146—Accessories, e.g. lens mounting devices
Definitions
- the invention relates to a system for mechanically processing spectacle lens blanks to produce spectacle lenses that are finished and edged on both sides according to the preamble of claim 1.
- spectacle lens blanks are understood to mean elements made of a silicate glass material or a plastic material that do not have an optically machined surface, or spectacle lenses that are finished on one side and not yet fully rimmed - but possibly pre-rimmed. These can, but do not have to be round.
- Such single-sided spectacle lenses are also referred to as blanks.
- a blank is first produced.
- this is a one-sided, usually tubular, spectacle lens.
- the finished side is generally the more difficult to manufacture surface, for example a surface with a progressive effect or an atoric one Area.
- the other surface which is also referred to as the prescription surface, is only produced when there is a specific order for a spectacle lens with a certain effect.
- the prescription surface is produced in such a way that the spectacle lens has the spherical and possibly toric or astigmatic effect required for the respective spectacle wearer.
- the prescription surface is often produced in so-called prescription glass factories; this means decentralized storage for blanks with connected production for comparatively simple spectacle lens surfaces, such as spherical or simple toric surfaces.
- the rim of the eyeglass lens is designed in accordance with the lens shape of the frame selected by the eyeglass wearer.
- the edge of the lens is currently mostly in the optician's shop, where the eyeglass wearer has also selected his frame.
- a recording block which, after the spectacle lens has been recorded once, allows both the surface treatment of the prescription surface and the edge treatment.
- This pick-up block thus serves as a workpiece carrier, which receives a blank to be machined during the entire machining, and is successively moved with the blank to the individual machining stations, in which the machining of an optical surface of the spectacle lens and the machining of the edge of the blank takes place .
- a disadvantage of the generic system for mechanical processing of spectacle lens blanks which can be found in DE-C-40 03 002, is double-edged and edged spectacle lenses, however, that the investment is still high, since each processing station is a complete one Has (conventional) device for edge or surface processing.
- the spectacle lenses in production have to be implemented "by hand" between the individual processing stations and the processing stations have to be "supplied” with the processing data for the respective spectacle lens.
- the time-consuming and also error-prone conversion and input of the processing data by hand can be avoided by using a device for automatic loading of the processing stations, as described in DE-A-42 14 427, but the investment increases considerable, since a positioning unit, such as an industrial robot, is also required.
- the invention has for its object to develop a system for the mechanical processing of spectacle lens blanks on both sides and edged spectacle lenses according to the preamble of patent claim 1 in such a way that the manufacture of such spectacle lenses is possible without multiple receptacles of the spectacle lens and, above all, with little investment is.
- the generic system for the production of edged spectacle lenses which are finished on both sides is further developed in such a way that the workpiece carriers, which are moved together with the lens they have taken up to the individual processing stations, are structurally at least part of the feed or positioning devices required for the machining of the blank received by the respective workpiece carrier is integrated.
- the spectacle lens blank to be machined is picked up by a workpiece carrier which, together with the spectacle lens blank that it has picked up, leads to the individual machining stations, that is to say, for example, the machining stations for the prescription surface and then to the machining stations for the edge is moved. This eliminates all errors that can arise from the multiple exposure of the same lens during surface and edge processing.
- the workpiece carriers have a feed device or a positioning device that performs at least some of the movements that are required for the processing in the respective processing station in accordance with the respective processing data:
- the positioning device of the workpiece carrier can, for example, rotate the blank lens about its axis in a defined manner.
- the movement of the grinding wheel which is necessary for the "delivery” between the grinding wheel and the spectacle lens and which is dependent on the angle of rotation of the glass holding shaft can then be carried out moved relative to the lens blank.
- the positioning device of the workpiece carrier according to claim 2 can be designed such that it has all the movement possibilities that are common to the individual processing stations or the majority of the processing stations, so that the tools in the individual processing stations are only those for the each processing station must perform a specific movement.
- the feed or integrated in the respective workpiece carrier Positioning devices carry out all the feed movements required for the specific machining of the blank in each case.
- the feed device integrated in the workpiece carrier In a processing station in which the edge of the spectacle lens blank is ground, the feed device integrated in the workpiece carrier not only executes the rotational movement of the blank, but also moves it towards or away from the grinding wheel as a function of the angle of rotation the grinding wheel is gone. If the edge is to be provided with a so-called "controlled" facet, the feed device integrated in the workpiece carrier can also shift the eyeglass blank according to the facet position in the direction of the axis of rotation of the blank.
- grinding or polishing shells can be arranged in a stationary manner, while the positioning device of the workpiece carrier lenglas blank rotates.
- the surface processing such as grinding or polishing
- the various movements of known aspherical grinding machines such as the A70 grinding machine from Carl Zeiss or the grinding machine of Gerber, USA, which largely corresponds in terms of their kinematics, and the "point-like" polishing device developed by Optician Werke G. Rodenstock for spectacle lenses it can be divided up in such a way that the "spherical" grinding wheel or the polishing head only rotates and all other movements are carried out by the workpiece holder.
- the workpiece carrier (s) can furthermore have a memory for the processing data of the respective glass that it has received.
- This memory can consist of a barcode coding, which is read in the respective processing station, or of an electronic memory, such as an EEPROM, which is provided with the necessary processing information before the start of processing, and that in the the respective processing station "transfers" the required information to the station or the control unit in the workpiece carrier, which controls the positioning or feed unit according to the desired processing result.
- a wide variety of devices can be used as workpiece carriers and positioning or feed devices:
- an industrial robot or a multi-axis positioning device which is controlled by an electronic control unit, can form the feed device assigned to the respective workpiece carrier.
- Each industrial robot holds a spectacle lens blank via a suitable gripper (claim 9) and positions it according to claim 6 in accordance with the specific processing data in the respective processing station.
- the gripper can pick up the respective spectacle lens blank on a block which is applied to one of the surfaces, preferably to an already finished surface.
- This block can, for example, be designed in accordance with DE-C-40 03 002.
- the block can be designed in a manner known per se from DE-A-42 14 427 so that the spectacle lens blank is received in the correct position. This is particularly necessary if the surface already processed is a progressive surface or a surface with an astigmatic effect.
- the gripper of the industrial robot or the holding element attached to the glass holding shaft is designed in such a way that it allows the eyeglass lens blank to be picked up directly, ie the blank can be clamped without a mounting adapter.
- a “holding element” is a gripper, which consists of the combination of a suction gripper, which can hold the lens blank on a surface for edge processing, with a jaw gripper, which holds the lens blank for surface treatment on Peripheral edge spans.
- the industrial robot can also transport the blank to be machined from one machining station to the next (claim 8).
- the workpiece carriers each have a glass holding shaft known per se, which can be positioned relative to the tools - preferably in at least two mutually perpendicular directions - and rotated about their axis , so that it is possible, for example, to process a surface in the manner of an aspherical grinding machine and then to process the individual peripheral sections of the spectacle lens edge one after the other.
- This glass holding shaft can in particular be provided with the holding element already described for receiving the blank. It is preferred if a simple interlinking system moves the workpiece carriers between the processing stations (claim 11).
- Another system can of course also be used, such as an industrial robot, for example, which transfers the workpiece carriers between the individual machining stations.
- the workpiece carriers can be docked onto them in the respective machining stations.
- the system according to the invention is suitable both for small optician shops and for the industrial processing of spectacle lens blanks. It is particularly advantageous that it is a modular expansion of a small system, on which only a single spectacle lens is used. Blank can be machined to a large system, on which many blanks can be processed at the same time.
- a loading device which loads the individual workpiece carriers with spectacle lens blanks.
- the loading device can be connected, for example, to a blank store, and automatically remove a suitable blank from this store in accordance with the respective regulation and place it in a free workpiece. Insert the carrier on which this blank then runs through the processing operation corresponding to the respective regulation.
- a removal device which removes the finished spectacle lenses from the respective workpiece carriers.
- the removal device can not only remove the finished and edged spectacle lens from the system according to the invention and insert it into a transport box, for example, but also label the transport box by means of a printer.
- the system according to the invention can have not only processing stations for mechanical processing of one or both surfaces, but also at least one processing station for surface treatment (claim 17).
- a reflective layer can be vapor-deposited, for example, in a manner known per se.
- stations can also be provided in which a hard layer is vapor-deposited or applied in some other way and / or a hard lacquer or a permanently or photochromically colored lacquer, e.g. spin-coated or applied by an immersion process.
- a station can be provided in which a receiving adapter is placed on one of the surfaces of the glass or the blank is checked and gripped or clamped correctly by means of a gripper or other holding element without using a receiving adapter.
- This station can have a centering device for the active placement of the receiving adapter or the gripping of the blank or passive centering allowed (claim 20). Furthermore, it can be checked in the centering device whether the diameter of the lens is sufficient so that at the respective viewing points of the spectacle wearer it can be ground into the selected frame (claim 21).
- FIG. 1 schematically shows the structure of a first embodiment of a system according to the invention
- FIG. 2 schematically shows the structure of a second embodiment of an installation according to the invention.
- FIG. 1 shows a first exemplary embodiment of the invention, in which a workpiece carrier is provided which has an industrial robot 1 for positioning the spectacle lens which it has received, one of which is not shown and controls in a manner known per se electronic control unit.
- a data processing system such as, for example, an order entry system, to transfer the specific data of the spectacle lens to be manufactured to the control unit, so that all errors which can arise from manual data input are excluded.
- the industrial robot 1 is a so-called articulated arm robot with axes 11 to 14 which can be pivoted relative to one another and which can be moved on a linear support 15 in the direction of the double arrow.
- the invention is not limited to this type of industrial robot, other industrial robots or other multi-axis positioning devices can also be used in the system according to the invention.
- the "last" axis 14 of the industrial robot the so-called “hand axis” carries a gripper 16 for receiving an eyeglass lens blank 2 to be machined.
- the gripper 16 is a parallel jaw gripper that holds the eyeglass lens blank 2 holds on a receiving adapter (block) 21, which is applied to a surface of the blank 2.
- a receiving adapter block 21
- other grippers such as scissor grippers, can also be used.
- Such receiving systems can have, for example, a suction gripper or another gripper that clamps the spectacle lens on a surface during edge processing, and a jaw gripper, such as a parallel jaw or scissor gripper, that holds the spectacle lens on the peripheral edge during surface treatment tense.
- a suction gripper or another gripper that clamps the spectacle lens on a surface during edge processing
- a jaw gripper such as a parallel jaw or scissor gripper, that holds the spectacle lens on the peripheral edge during surface treatment tense.
- the gripper 16 can be rotated about an axis 17 relative to the hand axis 14.
- a surface is processed in the processing station 3.
- the station 3 has an abrasive cup 31 which is rotated about an axis 32.
- the grinding shell 31 permits the machining of the surface on the eye side, which is generally a concave surface.
- stations for surface processing such as a polishing station, and / or stations for processing the front surface, which is generally a convex surface, can also be provided.
- other tools such as, for example, spherical grinding tools, which are in the form of a web - i.e. e.g. meridian-wise or spiral-shaped - to be moved over the surface to be worked.
- the tool 31 does not necessarily have to be rotatable about the axis 32.
- the relative rotation between tool 31 and spectacle lens blank 2 can also take place by rotating gripper 16 about axis 17.
- the processing of the edge of the spectacle lens blank 2 takes place in the processing station 4.
- the station 4 has a grinding wheel package 41, which in the exemplary embodiment shown consists of two grinding wheels for grinding the edge and for faceting, with a shaft 42 which by means of a drive direction is rotated about the axis of the shaft 42.
- the grinding wheel package 41 does not carry out any further movements.
- the infeed between the spectacle lens blank 2 and the grinding wheel package 41 takes place by a corresponding movement of the industrial robot 1; For example, this can be done on the linear support 15 in the direction of the double arrow.
- the exemplary embodiment shown in FIG. 1 also has a loading device 5 which feeds the spectacle lens blanks to the industrial robot 1 serving as the workpiece carrier.
- a removal device 6 is provided, which removes the finished spectacle glasses from the gripper 16.
- FIG. 2 shows a second exemplary embodiment of the invention, in which the same or essentially functionally identical parts are provided with the same reference numerals.
- a workpiece carrier 7 is provided, which is moved as a unit, for example by a linking system 8 or an industrial robot (not shown) between the processing stations 3 and 4 and the loading device 5 and the removal device 6.
- the workpiece carrier each has a glass holding shaft 71 which is known per se and which holds the respective spectacle lens blank 2 without a receiving adapter in this exemplary embodiment.
- the glass holding shaft 71 has a suction gripper 72 and a scissor gripper 73.
- the suction gripper 72 which can be evacuated via the hollow shaft 71 ', holds the glasses to be processed. Glass blank 2 during processing of the peripheral edge on one of the two surfaces.
- the scissor gripper 73 holds the blank 2 at the peripheral edge; during surface machining, the scissor gripper 73 is withdrawn in such a way that it does not interfere with the machining process.
- the glass holding shaft 71 can be positioned in the direction of its axis and perpendicular to it relative to the tools 31 and 41 and can be rotated in a defined manner about its axis.
- An electronic control unit (not shown) controls the specific processing of the respective blank in accordance with the data transferred to it.
- the workpiece holder 7 can be docked in the respective machining station 3 or 4 via pins 75.
- a linkage system 8 which is only shown schematically, transports the workpiece carrier 7 between the individual stations 3, 4, 5 and 6.
- This linkage system can, for example, be a simple belt conveyor, since the positioning accuracy is ensured by docking.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Inorganic Chemistry (AREA)
- Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7519832A JPH09508075A (en) | 1994-01-31 | 1995-01-31 | Equipment for mechanically processing lens blanks |
EP95906892A EP0742749A1 (en) | 1994-01-31 | 1995-01-31 | System for the grinding of spectacle lens |
DE19580027T DE19580027D2 (en) | 1994-01-31 | 1995-01-31 | System for the mechanical processing of spectacle lens blanks |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19944402782 DE4402782A1 (en) | 1994-01-31 | 1994-01-31 | Device for the production of double-sided, edged spectacle lenses |
DEP4402782.6 | 1994-01-31 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1995020466A1 true WO1995020466A1 (en) | 1995-08-03 |
Family
ID=6509061
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE1995/000116 WO1995020466A1 (en) | 1994-01-31 | 1995-01-31 | System for the grinding of spectacle lens |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0742749A1 (en) |
JP (1) | JPH09508075A (en) |
DE (2) | DE4402782A1 (en) |
WO (1) | WO1995020466A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10250856A1 (en) * | 2002-10-25 | 2004-05-13 | Carl Zeiss | Method and device for manufacturing optical glasses |
US20210101246A1 (en) * | 2019-10-03 | 2021-04-08 | Nidek Co., Ltd. | Eyeglass lens peripheral edge processing system and non-transitory computer-readable storage medium |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1492985A (en) * | 1975-05-22 | 1977-11-23 | Raphaels Ltd | Lens edgers |
US4829716A (en) * | 1985-10-22 | 1989-05-16 | Matsushita Electric Industrial Co. Ltd. | Apparatus for automatically performing plural sequential spherical grinding operations on workpieces |
EP0532892A1 (en) * | 1991-08-16 | 1993-03-24 | Wernicke & Co. GmbH | Equipment for grinding the optical surfaces and/or the edges of spectacle glasses |
DE4214427A1 (en) * | 1992-04-30 | 1993-11-04 | Wernicke & Co Gmbh | Automatic feeding machine for processing of edges of spectacle lenses - has supply unit for lenses held at reception adaptor which is set up on front or rear surface of lens |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2288588A1 (en) * | 1974-07-12 | 1976-05-21 | Essilor Int | MACHINE FOR SERIAL MACHINING OF THE TWO SIDES OF AN OPHTHALMIC LENS |
JPS62297049A (en) * | 1986-06-17 | 1987-12-24 | Tokyo Keiki Co Ltd | Factory automation system |
DE4003002A1 (en) * | 1989-11-15 | 1991-05-16 | Wernicke & Co Gmbh | Process and holder for production of spectacles lens - has holder in three parts enabling lens blank to be completely processed without re-mounting |
DE4221377A1 (en) * | 1991-07-01 | 1993-01-07 | Wernicke & Co Gmbh | Mfg. contoured spectacle lens - using initial shape of blank and required lens contour data to calculate position of second lens surface |
-
1994
- 1994-01-31 DE DE19944402782 patent/DE4402782A1/en not_active Withdrawn
-
1995
- 1995-01-31 DE DE19580027T patent/DE19580027D2/en not_active Expired - Fee Related
- 1995-01-31 EP EP95906892A patent/EP0742749A1/en not_active Withdrawn
- 1995-01-31 WO PCT/DE1995/000116 patent/WO1995020466A1/en not_active Application Discontinuation
- 1995-01-31 JP JP7519832A patent/JPH09508075A/en active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1492985A (en) * | 1975-05-22 | 1977-11-23 | Raphaels Ltd | Lens edgers |
US4829716A (en) * | 1985-10-22 | 1989-05-16 | Matsushita Electric Industrial Co. Ltd. | Apparatus for automatically performing plural sequential spherical grinding operations on workpieces |
EP0532892A1 (en) * | 1991-08-16 | 1993-03-24 | Wernicke & Co. GmbH | Equipment for grinding the optical surfaces and/or the edges of spectacle glasses |
DE4214427A1 (en) * | 1992-04-30 | 1993-11-04 | Wernicke & Co Gmbh | Automatic feeding machine for processing of edges of spectacle lenses - has supply unit for lenses held at reception adaptor which is set up on front or rear surface of lens |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10250856A1 (en) * | 2002-10-25 | 2004-05-13 | Carl Zeiss | Method and device for manufacturing optical glasses |
US20210101246A1 (en) * | 2019-10-03 | 2021-04-08 | Nidek Co., Ltd. | Eyeglass lens peripheral edge processing system and non-transitory computer-readable storage medium |
Also Published As
Publication number | Publication date |
---|---|
DE19580027D2 (en) | 1996-11-14 |
JPH09508075A (en) | 1997-08-19 |
DE4402782A1 (en) | 1995-08-10 |
EP0742749A1 (en) | 1996-11-20 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP1719582B1 (en) | High-speed milling and turning machine and method of machining especially spectacle glasses | |
EP1736279B1 (en) | Method and device for producing optical glasses | |
EP2308644B1 (en) | Apparatus for fine machining optically active surfaces of spectacle lenses | |
EP1436119B2 (en) | Device and method for complete machining of lenses that are optically active on two sides | |
EP2631033B1 (en) | Method and device for machining spectacle lens blanks | |
EP3409419B1 (en) | Method and device for machining the edge of an optical lens | |
DE102009048012A1 (en) | Method for operating a gear or profile grinding machine and toothing or profile grinding machine | |
DE102015102899B4 (en) | Milling device for the production of spectacle lenses with two milling stations | |
EP1871570A1 (en) | Production line for flexibly machining workpieces | |
EP0916448B1 (en) | Method and apparatus for polishing both sides of optical lenses | |
EP1718435A1 (en) | Machine tool for machining workpieces | |
EP3061548A2 (en) | Simultaneous rotating machine for the manufacture of spectacles glass | |
EP3043956A1 (en) | Machine tool and method for machining a workpiece | |
DE10146542B4 (en) | Handling objects, such as lenses | |
EP2998067B1 (en) | Simultaneous rotating machine for the manufacture of spectacles glass | |
WO2019207003A1 (en) | Machine tool having a work spindle on an inclined surface | |
WO2001070460A1 (en) | Assembly for machining the edges of spectacle lenses | |
DE102011118747A1 (en) | Method for machining shaft-like workpiece, involves providing gripping device on workpiece carrier during removing and storing of finished workpiece | |
WO1995020466A1 (en) | System for the grinding of spectacle lens | |
EP0937542A1 (en) | Method for polishing optical lenses and polishing apparatus with multiple spindles and tools for carrying out the method | |
EP1291125A2 (en) | Method of stocking tool magazines of a device for the machining of workpieces | |
EP1184146A2 (en) | Rotating processing machine, in particular cleaning machine for ceramic articles | |
DE102022000537A1 (en) | Processing device for optical workpieces and use of a double gripper | |
DE10246150A1 (en) | Grinding machine for grinding workpieces has grinding axis approximately vertical | |
DE202014009978U1 (en) | Device for processing an optical lens |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): DE JP US |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): AT BE CH DE DK ES FR GB GR IE IT LU MC NL PT SE |
|
DFPE | Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101) | ||
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
WWE | Wipo information: entry into national phase |
Ref document number: 1995906892 Country of ref document: EP |
|
REF | Corresponds to |
Ref document number: 19580027 Country of ref document: DE Date of ref document: 19961114 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 19580027 Country of ref document: DE |
|
WWP | Wipo information: published in national office |
Ref document number: 1995906892 Country of ref document: EP |
|
ENP | Entry into the national phase |
Ref document number: 1997 870832 Country of ref document: US Date of ref document: 19970606 Kind code of ref document: A |
|
WWW | Wipo information: withdrawn in national office |
Ref document number: 1995906892 Country of ref document: EP |