IL90163A - High-efficiency holograms based on multi-layered holography - Google Patents
High-efficiency holograms based on multi-layered holographyInfo
- Publication number
- IL90163A IL90163A IL9016389A IL9016389A IL90163A IL 90163 A IL90163 A IL 90163A IL 9016389 A IL9016389 A IL 9016389A IL 9016389 A IL9016389 A IL 9016389A IL 90163 A IL90163 A IL 90163A
- Authority
- IL
- Israel
- Prior art keywords
- hologram
- layer
- photosensitive layer
- holograms
- photosensitive
- Prior art date
Links
- 239000002365 multiple layer Substances 0.000 title description 8
- 238000001093 holography Methods 0.000 title description 6
- 239000010410 layer Substances 0.000 claims description 177
- 108010010803 Gelatin Proteins 0.000 claims description 71
- 229920000159 gelatin Polymers 0.000 claims description 71
- 235000019322 gelatine Nutrition 0.000 claims description 71
- 235000011852 gelatine desserts Nutrition 0.000 claims description 71
- 239000008273 gelatin Substances 0.000 claims description 70
- 238000000034 method Methods 0.000 claims description 37
- 239000000463 material Substances 0.000 claims description 28
- 239000000758 substrate Substances 0.000 claims description 27
- 238000012545 processing Methods 0.000 claims description 26
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 claims description 15
- 238000000576 coating method Methods 0.000 claims description 14
- 238000001035 drying Methods 0.000 claims description 14
- 239000012790 adhesive layer Substances 0.000 claims description 12
- JOSWYUNQBRPBDN-UHFFFAOYSA-P ammonium dichromate Chemical compound [NH4+].[NH4+].[O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O JOSWYUNQBRPBDN-UHFFFAOYSA-P 0.000 claims description 12
- 230000003993 interaction Effects 0.000 claims description 11
- 230000005855 radiation Effects 0.000 claims description 11
- 239000011248 coating agent Substances 0.000 claims description 9
- 238000005406 washing Methods 0.000 claims description 9
- 230000000694 effects Effects 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 4
- 150000001412 amines Chemical class 0.000 claims description 2
- 230000015572 biosynthetic process Effects 0.000 description 5
- 239000000975 dye Substances 0.000 description 5
- SOCTUWSJJQCPFX-UHFFFAOYSA-N dichromate(2-) Chemical compound [O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O SOCTUWSJJQCPFX-UHFFFAOYSA-N 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000018044 dehydration Effects 0.000 description 3
- 238000006297 dehydration reaction Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000002791 soaking Methods 0.000 description 3
- 238000004528 spin coating Methods 0.000 description 3
- 229920002799 BoPET Polymers 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 2
- 239000005041 Mylar™ Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000003618 dip coating Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000003384 imaging method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 238000012958 reprocessing Methods 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 230000008961 swelling Effects 0.000 description 2
- 238000010345 tape casting Methods 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- 102000008186 Collagen Human genes 0.000 description 1
- 108010035532 Collagen Proteins 0.000 description 1
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 1
- 206010034972 Photosensitivity reaction Diseases 0.000 description 1
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000002730 additional effect Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000012298 atmosphere Substances 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 229920002301 cellulose acetate Polymers 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000001427 coherent effect Effects 0.000 description 1
- 229920001436 collagen Polymers 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000008098 formaldehyde solution Substances 0.000 description 1
- 125000002485 formyl group Chemical class [H]C(*)=O 0.000 description 1
- 108010025899 gelatin film Proteins 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- 230000000266 injurious effect Effects 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000036961 partial effect Effects 0.000 description 1
- 230000002165 photosensitisation Effects 0.000 description 1
- 230000036211 photosensitivity Effects 0.000 description 1
- 239000003504 photosensitizing agent Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 239000004848 polyfunctional curative Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000002829 reductive effect Effects 0.000 description 1
- 238000002310 reflectometry Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- -1 silver halide Chemical class 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229960004418 trolamine Drugs 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/20—Filters
- G02B5/203—Filters having holographic or diffractive elements
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
- G03C5/00—Photographic processes or agents therefor; Regeneration of such processing agents
- G03C5/22—Direct chromate processes, i.e. without preceding silver picture, or agents therefor
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
- G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
- G03H1/02—Details of features involved during the holographic process; Replication of holograms without interference recording
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
- G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
- G03H1/04—Processes or apparatus for producing holograms
- G03H1/0402—Recording geometries or arrangements
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
- G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
- G03H1/04—Processes or apparatus for producing holograms
- G03H1/18—Particular processing of hologram record carriers, e.g. for obtaining blazed holograms
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
- G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
- G03H1/26—Processes or apparatus specially adapted to produce multiple sub- holograms or to obtain images from them, e.g. multicolour technique
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
- G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
- G03H1/02—Details of features involved during the holographic process; Replication of holograms without interference recording
- G03H1/0252—Laminate comprising a hologram layer
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
- G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
- G03H1/04—Processes or apparatus for producing holograms
- G03H1/18—Particular processing of hologram record carriers, e.g. for obtaining blazed holograms
- G03H1/181—Pre-exposure processing, e.g. hypersensitisation
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
- G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
- G03H1/04—Processes or apparatus for producing holograms
- G03H1/18—Particular processing of hologram record carriers, e.g. for obtaining blazed holograms
- G03H1/182—Post-exposure processing, e.g. latensification
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
- G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
- G03H1/04—Processes or apparatus for producing holograms
- G03H1/0402—Recording geometries or arrangements
- G03H2001/043—Non planar recording surface, e.g. curved surface
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
- G03H2260/00—Recording materials or recording processes
- G03H2260/10—Dichromated gelatine or equivalents
-
- 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
- Y10S359/00—Optical: systems and elements
- Y10S359/90—Methods
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Holo Graphy (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US07/207,084 US5162927A (en) | 1988-06-15 | 1988-06-15 | High efficiency holograms by multiple-layer holography |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| IL90163A0 IL90163A0 (en) | 1989-12-15 |
| IL90163A true IL90163A (en) | 1994-10-21 |
Family
ID=22769142
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IL9016389A IL90163A (en) | 1988-06-15 | 1989-05-02 | High-efficiency holograms based on multi-layered holography |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US5162927A (ja) |
| EP (1) | EP0346869B1 (ja) |
| JP (1) | JPH0233180A (ja) |
| CA (1) | CA1332521C (ja) |
| DE (1) | DE68926364T2 (ja) |
| IL (1) | IL90163A (ja) |
Families Citing this family (26)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2661769B1 (fr) * | 1990-05-02 | 1995-04-21 | Thomson Csf | Systeme d'enregistrement optique de donnees sur disque, et procedes de lecture et ecriture correspondants. |
| US5282066A (en) * | 1991-05-31 | 1994-01-25 | Hughes Aircraft Company | Multiple layer holograms |
| JPH05273900A (ja) * | 1992-03-27 | 1993-10-22 | Nippon Paint Co Ltd | カラーホログラム用多層体 |
| GB2271435B (en) * | 1992-10-06 | 1996-05-22 | Grumman Aerospace Corp | A system and method of fabricating multiple holographic elements |
| US5335099A (en) * | 1992-12-22 | 1994-08-02 | Hughes Aircraft Company | Veiling glare control holographic windshield |
| US5900932A (en) * | 1993-07-02 | 1999-05-04 | Canon Information Systems, Inc. | Tristimulus template-type colorimeter |
| US5464690A (en) * | 1994-04-04 | 1995-11-07 | Novavision, Inc. | Holographic document and method for forming |
| US5606434A (en) * | 1994-06-30 | 1997-02-25 | University Of North Carolina | Achromatic optical system including diffractive optical element |
| US5728324A (en) * | 1995-01-31 | 1998-03-17 | Digital Optics Corporation | Molding diffractive optical elements |
| US5694230A (en) * | 1995-06-07 | 1997-12-02 | Digital Optics Corp. | Diffractive optical elements as combiners |
| US6266473B1 (en) | 1997-02-07 | 2001-07-24 | Alliedsignal Inc. | Reflective display |
| US6139146A (en) * | 1997-12-29 | 2000-10-31 | Novartis Ag | Programmable corrective lenses |
| US5997140A (en) * | 1997-12-29 | 1999-12-07 | Novartis Ag | Actively controllable multifocal lens |
| US6139147A (en) * | 1998-11-20 | 2000-10-31 | Novartis Ag | Actively controllable multifocal lens |
| JP3059216U (ja) * | 1998-11-20 | 1999-07-09 | ブリヂストンスポーツ株式会社 | 運動用具用包装体 |
| US6070724A (en) * | 1999-04-07 | 2000-06-06 | American Safety Razor | Package with holographic image generating decal |
| US6497778B1 (en) | 2000-04-19 | 2002-12-24 | Novavision, Inc. | Method for making holographic foil |
| US6638386B2 (en) | 2000-04-19 | 2003-10-28 | Novavision, Inc. | Method for making holographic foil |
| US20020093701A1 (en) * | 2000-12-29 | 2002-07-18 | Xiaoxiao Zhang | Holographic multifocal lens |
| JP4193537B2 (ja) * | 2003-03-24 | 2008-12-10 | 富士ゼロックス株式会社 | 光記録媒体及び光記録媒体の製造方法 |
| JP4534483B2 (ja) * | 2003-12-25 | 2010-09-01 | Ｔｄｋ株式会社 | ホログラフィック記録媒体、ホログラム記録消去方法及びホログラフィック記録再生装置 |
| WO2005092635A1 (en) | 2004-03-29 | 2005-10-06 | Glud & Marstrand A/S | A method of producing a composite surface and an article having a composite surface |
| US20070105254A1 (en) * | 2004-10-25 | 2007-05-10 | Research Investment Network, Inc. | Method for making a multi-layer diffractive optics memory |
| JP4876400B2 (ja) * | 2005-02-01 | 2012-02-15 | 日産自動車株式会社 | 車両のフード構造 |
| DE102016109633B4 (de) * | 2016-05-25 | 2022-12-29 | Leonhard Kurz Stiftung & Co. Kg | Verfahren zur Herstellung einer Volumenhologrammfolie mit als Übertragungsabschnitte ausgebildeten Sicherheitselementen |
| EP4028834A4 (en) * | 2019-09-10 | 2023-10-11 | Google LLC | METHODS AND MEDIA FOR RECORDING HOLOGRAMS |
Family Cites Families (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3617274A (en) * | 1968-03-29 | 1971-11-02 | Bell Telephone Labor Inc | Hardened gelatin holographic recording medium |
| DE2339579A1 (de) * | 1973-08-04 | 1975-02-13 | Agfa Gevaert Ag | Verfahren zur herstellung lichtechter phasenhologramme |
| US4245882A (en) * | 1977-11-04 | 1981-01-20 | Environmental Research Institute Of Michigan | Doubly modulated on-axis thick hologram optical element |
| US4187106A (en) * | 1979-03-23 | 1980-02-05 | The United States Of America As Represented By The Secretary Of The Army | Process for making phase holograms |
| US4420218A (en) * | 1980-04-19 | 1983-12-13 | Institut Fiziki An Bssr | Method of object imaging |
| US4329409A (en) * | 1980-08-04 | 1982-05-11 | Hughes Aircraft Company | Process for fabricating stable holograms |
| JPS57173873A (en) * | 1981-04-20 | 1982-10-26 | Ricoh Co Ltd | Moisture proof treatment of phase hologram |
| US4637678A (en) * | 1982-06-01 | 1987-01-20 | Hughes Aircraft Company | Holographic laser protection device |
| US4601533A (en) * | 1982-10-29 | 1986-07-22 | The United States Of America As Represented By The Secretary Of The Navy | Laser eye protection visor using multiple holograms |
| JPH0614123B2 (ja) * | 1983-02-23 | 1994-02-23 | 大日本印刷株式会社 | ホログラム記録体およびその製作方法 |
| US4509817A (en) * | 1983-08-01 | 1985-04-09 | Ncr Corporation | Method for correcting volume-phase-gelatin holograms Bragg's angle deviation |
| US4510221A (en) * | 1983-08-01 | 1985-04-09 | Ncr Corporation | Process for making high efficiency phase holograms |
| US4815800A (en) * | 1984-12-21 | 1989-03-28 | Hughes Aircraft Company | Flare reduction in holograms |
| US4854674A (en) * | 1985-02-27 | 1989-08-08 | Hughes Aircraft Company | Process for improving holographic efficiency |
| US4799746A (en) * | 1985-02-27 | 1989-01-24 | Hughes Aircraft Company | Efficient holograms and method for making same |
| JPS62124585A (ja) * | 1985-11-26 | 1987-06-05 | Fujitsu Ltd | 多層ホログラム |
| US4795223A (en) * | 1987-01-06 | 1989-01-03 | Hughes Aircraft Company | Segmented 3-D hologram display |
| US4789211A (en) * | 1987-02-13 | 1988-12-06 | Hughes Aircraft Company | Hologram stabilizing assembly and method |
| US4826290A (en) * | 1987-09-21 | 1989-05-02 | Hughes Aircraft Company | Method of producing stable holograms in dichromatic gelatin |
| US4853306A (en) * | 1987-09-21 | 1989-08-01 | Hughes Aircraft Company | Method and apparatus for dehydrating dichromatic gelatin holograms |
| US4808500A (en) * | 1987-11-20 | 1989-02-28 | Hughes Aircraft Company | Stabilizing hydrophilic gelatin holograms having improved resistance to swelling |
-
1988
- 1988-06-15 US US07/207,084 patent/US5162927A/en not_active Expired - Lifetime
-
1989
- 1989-05-01 CA CA000598316A patent/CA1332521C/en not_active Expired - Fee Related
- 1989-05-02 IL IL9016389A patent/IL90163A/en not_active IP Right Cessation
- 1989-06-14 DE DE68926364T patent/DE68926364T2/de not_active Expired - Fee Related
- 1989-06-14 EP EP89110795A patent/EP0346869B1/en not_active Expired - Lifetime
- 1989-06-15 JP JP1150668A patent/JPH0233180A/ja active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| EP0346869B1 (en) | 1996-05-01 |
| CA1332521C (en) | 1994-10-18 |
| IL90163A0 (en) | 1989-12-15 |
| US5162927A (en) | 1992-11-10 |
| EP0346869A3 (en) | 1992-07-01 |
| DE68926364D1 (de) | 1996-06-05 |
| JPH0233180A (ja) | 1990-02-02 |
| EP0346869A2 (en) | 1989-12-20 |
| DE68926364T2 (de) | 1996-08-14 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| RH | Patent void |