GB235210A - Improvements in or relating to the manufacture of photographic emulsions - Google Patents
Improvements in or relating to the manufacture of photographic emulsionsInfo
- Publication number
- GB235210A GB235210A GB14630/25A GB1463025A GB235210A GB 235210 A GB235210 A GB 235210A GB 14630/25 A GB14630/25 A GB 14630/25A GB 1463025 A GB1463025 A GB 1463025A GB 235210 A GB235210 A GB 235210A
- Authority
- GB
- United Kingdom
- Prior art keywords
- ligroin
- alcohol
- solution
- sensitizing material
- sensitizing
- 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
- 239000000839 emulsion Substances 0.000 title abstract 3
- 238000004519 manufacturing process Methods 0.000 title abstract 2
- 239000000463 material Substances 0.000 abstract 12
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 abstract 9
- 230000001235 sensitizing effect Effects 0.000 abstract 9
- 235000019441 ethanol Nutrition 0.000 abstract 8
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 abstract 6
- 239000000284 extract Substances 0.000 abstract 6
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 abstract 4
- 229930182558 Sterol Natural products 0.000 abstract 4
- 239000002244 precipitate Substances 0.000 abstract 4
- 150000003432 sterols Chemical class 0.000 abstract 4
- 235000003702 sterols Nutrition 0.000 abstract 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 4
- 239000012675 alcoholic extract Substances 0.000 abstract 3
- 238000009835 boiling Methods 0.000 abstract 3
- 239000013078 crystal Substances 0.000 abstract 3
- 238000001704 evaporation Methods 0.000 abstract 3
- 239000007788 liquid Substances 0.000 abstract 3
- 239000003921 oil Substances 0.000 abstract 3
- 239000003208 petroleum Substances 0.000 abstract 3
- 238000002360 preparation method Methods 0.000 abstract 3
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 abstract 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 abstract 2
- 210000000988 bone and bone Anatomy 0.000 abstract 2
- 235000013312 flour Nutrition 0.000 abstract 2
- 230000001590 oxidative effect Effects 0.000 abstract 2
- 239000000047 product Substances 0.000 abstract 2
- 235000011121 sodium hydroxide Nutrition 0.000 abstract 2
- 239000002904 solvent Substances 0.000 abstract 2
- 244000045232 Canavalia ensiformis Species 0.000 abstract 1
- 241000196324 Embryophyta Species 0.000 abstract 1
- 239000001828 Gelatine Substances 0.000 abstract 1
- 235000010617 Phaseolus lunatus Nutrition 0.000 abstract 1
- BELBBZDIHDAJOR-UHFFFAOYSA-N Phenolsulfonephthalein Chemical compound C1=CC(O)=CC=C1C1(C=2C=CC(O)=CC=2)C2=CC=CC=C2S(=O)(=O)O1 BELBBZDIHDAJOR-UHFFFAOYSA-N 0.000 abstract 1
- 150000001298 alcohols Chemical class 0.000 abstract 1
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 abstract 1
- 229910021502 aluminium hydroxide Inorganic materials 0.000 abstract 1
- 235000011126 aluminium potassium sulphate Nutrition 0.000 abstract 1
- 239000004464 cereal grain Substances 0.000 abstract 1
- 235000013339 cereals Nutrition 0.000 abstract 1
- 239000012141 concentrate Substances 0.000 abstract 1
- 238000001816 cooling Methods 0.000 abstract 1
- 238000002425 crystallisation Methods 0.000 abstract 1
- 230000008025 crystallization Effects 0.000 abstract 1
- 238000010908 decantation Methods 0.000 abstract 1
- 230000002708 enhancing effect Effects 0.000 abstract 1
- 230000008020 evaporation Effects 0.000 abstract 1
- 238000000605 extraction Methods 0.000 abstract 1
- 238000001914 filtration Methods 0.000 abstract 1
- 229920000159 gelatin Polymers 0.000 abstract 1
- 235000019322 gelatine Nutrition 0.000 abstract 1
- 235000011187 glycerol Nutrition 0.000 abstract 1
- 239000012535 impurity Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- 239000000203 mixture Substances 0.000 abstract 1
- 235000019508 mustard seed Nutrition 0.000 abstract 1
- 229960003531 phenolsulfonphthalein Drugs 0.000 abstract 1
- 239000000419 plant extract Substances 0.000 abstract 1
- GRLPQNLYRHEGIJ-UHFFFAOYSA-J potassium aluminium sulfate Chemical compound [Al+3].[K+].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O GRLPQNLYRHEGIJ-UHFFFAOYSA-J 0.000 abstract 1
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 238000010992 reflux Methods 0.000 abstract 1
- 230000035945 sensitivity Effects 0.000 abstract 1
- 238000003860 storage Methods 0.000 abstract 1
- 210000001519 tissue Anatomy 0.000 abstract 1
- 235000013311 vegetables Nutrition 0.000 abstract 1
- 238000005406 washing Methods 0.000 abstract 1
Classifications
-
- 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
- G03C1/00—Photosensitive materials
- G03C1/005—Silver halide emulsions; Preparation thereof; Physical treatment thereof; Incorporation of additives therein
- G03C1/06—Silver halide emulsions; Preparation thereof; Physical treatment thereof; Incorporation of additives therein with non-macromolecular additives
- G03C1/08—Sensitivity-increasing substances
- G03C1/10—Organic substances
-
- 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
- G03C1/00—Photosensitive materials
- G03C1/005—Silver halide emulsions; Preparation thereof; Physical treatment thereof; Incorporation of additives therein
- G03C1/04—Silver halide emulsions; Preparation thereof; Physical treatment thereof; Incorporation of additives therein with macromolecular additives; with layer-forming substances
- G03C1/047—Proteins, e.g. gelatine derivatives; Hydrolysis or extraction products of proteins
-
- 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
- G03C1/00—Photosensitive materials
- G03C1/005—Silver halide emulsions; Preparation thereof; Physical treatment thereof; Incorporation of additives therein
- G03C1/06—Silver halide emulsions; Preparation thereof; Physical treatment thereof; Incorporation of additives therein with non-macromolecular additives
- G03C1/08—Sensitivity-increasing substances
- G03C1/09—Noble metals or mercury; Salts or compounds thereof; Sulfur, selenium or tellurium, or compounds thereof, e.g. for chemical sensitising
Landscapes
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- General Physics & Mathematics (AREA)
- Colloid Chemistry (AREA)
- Silver Salt Photography Or Processing Solution Therefor (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Seasonings (AREA)
- Processes Of Treating Macromolecular Substances (AREA)
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US718409A US1600736A (en) | 1924-06-06 | 1924-06-06 | Art of light-sensitive photographic materials |
| US718411A US1574944A (en) | 1924-06-06 | 1924-06-06 | Photographic light-sensitive material and process of making the same |
| US718410A US1574943A (en) | 1924-06-06 | 1924-06-06 | Art of light-sensitive photographic materials |
| US82845A US1602590A (en) | 1924-06-06 | 1926-01-21 | Utilization of biochemical light-sensitizing extracts in the art of photographic materials |
| US82846A US1602591A (en) | 1924-06-06 | 1926-01-21 | Photographic light-sensitive material containing tellurium and process of making the same |
| US82847A US1602592A (en) | 1924-06-06 | 1926-01-21 | Photographic light-sensitive material containing selenium and process of making the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB235210A true GB235210A (en) | 1926-12-06 |
Family
ID=27557251
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB14629/25A Expired GB235209A (en) | 1924-06-06 | 1925-06-05 | Improvements in or relating to the manufacture of photographic emulsions |
| GB14630/25A Expired GB235210A (en) | 1924-06-06 | 1925-06-05 | Improvements in or relating to the manufacture of photographic emulsions |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB14629/25A Expired GB235209A (en) | 1924-06-06 | 1925-06-05 | Improvements in or relating to the manufacture of photographic emulsions |
Country Status (5)
| Country | Link |
|---|---|
| US (6) | US1574943A (en:Method) |
| DE (3) | DE441934C (en:Method) |
| FR (3) | FR599933A (en:Method) |
| GB (2) | GB235209A (en:Method) |
| NL (1) | NL21355C (en:Method) |
Families Citing this family (70)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2449153A (en) * | 1944-04-03 | 1948-09-14 | Urbach Franz | Photographic silver bromide emulsion sensitized with cysteine |
| BE474236A (en:Method) * | 1946-06-29 | |||
| US2571688A (en) * | 1946-11-29 | 1951-10-16 | Ilford Ltd | Production of colloidal silver |
| US2644756A (en) * | 1947-02-08 | 1953-07-07 | Polaroid Corp | Photographic process for forming a positive transfer image |
| US2751299A (en) * | 1952-11-08 | 1956-06-19 | Eastman Kodak Co | Mercury stabilizers for photographic emulsions sensitized with polyalkylene esters, amides, and ethers |
| US2743180A (en) * | 1953-07-01 | 1956-04-24 | Eastman Kodak Co | Pentazaindene stabilizers for photo-graphic emulsions sensitized with alkylene oxide polymers |
| US2757088A (en) * | 1953-12-30 | 1956-07-31 | Du Pont | Photographic silver halide emulsions containing phytic acid |
| US2757089A (en) * | 1954-01-05 | 1956-07-31 | Du Pont | Phytic acid sensitizer for silver halide emulsions |
| BE539322A (en:Method) * | 1954-06-29 | |||
| US2999751A (en) * | 1957-07-30 | 1961-09-12 | Gen Aniline & Film Corp | Chemical sensitizing of photographic silver halide emulsions |
| US3184312A (en) * | 1958-11-14 | 1965-05-18 | Eastman Kodak Co | Photographic emulsions containing carboxymethylated pigskin gelatin |
| BE624013A (en:Method) * | 1961-10-26 | |||
| DE1151174B (de) * | 1962-01-31 | 1963-07-04 | Dr Karl Petz | Verfahren zur Herstellung hochempfindlicher photographischer Emulsionen mit Hilfe der Sensibilisierung durch Goldsalze |
| BE659479A (en:Method) * | 1964-02-10 | 1965-05-28 | ||
| GB1143673A (en:Method) * | 1965-04-29 | |||
| US3320069A (en) * | 1966-03-18 | 1967-05-16 | Eastman Kodak Co | Sulfur group sensitized emulsions |
| GB1282303A (en) * | 1969-03-07 | 1972-07-19 | Agfa Gevaert | Improved light-sensitive material |
| BE759200A (fr) * | 1969-11-21 | 1971-05-21 | Du Pont | Procede de production d'emulsion d'halogenure d'argent de sensibilite elevee |
| US3622318A (en) * | 1970-03-20 | 1971-11-23 | Eastman Kodak Co | Photographic materials and processes |
| JPS5068133A (en:Method) * | 1973-10-18 | 1975-06-07 | ||
| JPS511116A (ja) * | 1974-06-21 | 1976-01-07 | Mitsubishi Paper Mills Ltd | Harogenkaginshashinnyuzaino seizoho |
| US4197124A (en) * | 1975-07-29 | 1980-04-08 | Fuji Photo Film Co., Ltd. | Non-treatment type planographic printing plate materials |
| JPS5945135B2 (ja) * | 1979-06-15 | 1984-11-05 | 富士写真フイルム株式会社 | ハロゲン化銀写真感光材料 |
| JPS5830747A (ja) * | 1981-08-17 | 1983-02-23 | Konishiroku Photo Ind Co Ltd | ハロゲン化銀写真乳剤 |
| JPS5969754A (ja) | 1982-10-14 | 1984-04-20 | Fuji Photo Film Co Ltd | ハロゲン化銀カラ−感光材料 |
| JPS59116647A (ja) | 1982-12-13 | 1984-07-05 | Konishiroku Photo Ind Co Ltd | ハロゲン化銀写真感光材料 |
| JPS59137946A (ja) | 1983-01-28 | 1984-08-08 | Fuji Photo Film Co Ltd | ハロゲン化銀感光材料 |
| JPS59188641A (ja) | 1983-04-11 | 1984-10-26 | Fuji Photo Film Co Ltd | ハロゲン化銀写真乳剤 |
| US4665017A (en) * | 1983-12-08 | 1987-05-12 | Fuji Photo Film Co., Ltd. | Process for preparing silver halide emulsion and silver halide photographic light-sensitive material |
| JPS60143331A (ja) | 1983-12-29 | 1985-07-29 | Fuji Photo Film Co Ltd | ハロゲン化銀写真感光材料 |
| JPS613137A (ja) * | 1984-06-15 | 1986-01-09 | Fuji Photo Film Co Ltd | 内部潜像型コア／シエル直接ポジハロゲン化銀乳剤及びその製造法 |
| JPS613134A (ja) * | 1984-06-15 | 1986-01-09 | Fuji Photo Film Co Ltd | ハロゲン化銀乳剤の製造方法およびハロゲン化銀写真感光材料 |
| JPS61245151A (ja) | 1985-04-23 | 1986-10-31 | Konishiroku Photo Ind Co Ltd | ハロゲン化銀写真感光材料 |
| JPS61250645A (ja) | 1985-04-30 | 1986-11-07 | Konishiroku Photo Ind Co Ltd | ハロゲン化銀写真感光材料 |
| JPS61250643A (ja) | 1985-04-30 | 1986-11-07 | Konishiroku Photo Ind Co Ltd | ハロゲン化銀写真感光材料 |
| EP0209118B1 (en) | 1985-07-17 | 1991-10-23 | Konica Corporation | Silver halide photographic material |
| EP0228084B1 (en) | 1985-12-25 | 1992-03-18 | Fuji Photo Film Co., Ltd. | Image forming process |
| DE3782351T2 (de) | 1986-03-25 | 1993-05-27 | Konishiroku Photo Ind | Lichtempfindliches photographisches silberhalogenidmaterial, das fuer schnelle entwicklung verwendbar ist. |
| US5166045A (en) * | 1989-06-19 | 1992-11-24 | Eastman Kodak Company | Doping of silver halide emulsions with group VIB compounds to form improved photoactive grains |
| DE69003680T2 (de) * | 1989-06-19 | 1994-05-05 | Eastman Kodak Co | Dotierung von Silberhalogenidemulsionen mit einem Kaliumselencyanat-Salz zur Bildung verbesserter fotoaktiver Körner. |
| EP0476327B1 (en) | 1990-08-20 | 1999-11-17 | Fuji Photo Film Co., Ltd. | Data-retainable photographic film product and process for producing color print |
| JPH04204640A (ja) * | 1990-11-30 | 1992-07-27 | Fuji Photo Film Co Ltd | ハロゲン化銀写真感光材料 |
| US5240827A (en) * | 1991-02-08 | 1993-08-31 | Eastman Kodak Company | Photographic element containing large, selenium-sensitized silver chloride grains |
| DE69230387T2 (de) | 1991-04-22 | 2000-06-29 | Fuji Photo Film Co., Ltd. | Photographische Silberhalogenidmaterialien und Verfahren zu ihrer Verarbeitung |
| JP2699029B2 (ja) * | 1991-05-08 | 1998-01-19 | 富士写真フイルム株式会社 | ハロゲン化銀写真感光材料 |
| JP2936105B2 (ja) * | 1991-06-06 | 1999-08-23 | コニカ株式会社 | ハロゲン化銀乳剤の製造方法及びハロゲン化銀写真感光材料 |
| JP2778853B2 (ja) * | 1991-06-28 | 1998-07-23 | 富士写真フイルム株式会社 | ハロゲン化銀写真感光材料 |
| US5395745A (en) * | 1991-06-28 | 1995-03-07 | Fuji Photo Film Co., Ltd. | Silver halide emulsion, and light-sensitive material prepared by using the emulsion |
| US5459027A (en) * | 1991-06-28 | 1995-10-17 | Fuji Photo Film Co., Ltd. | Silver halide photographic light-sensitive material |
| JP2691089B2 (ja) * | 1991-07-24 | 1997-12-17 | 富士写真フイルム株式会社 | ハロゲン化銀写真感光材料 |
| JPH05127290A (ja) * | 1991-11-06 | 1993-05-25 | Konica Corp | ハロゲン化銀写真乳剤およびそれを用いたハロゲン化銀写真感光材料 |
| JP2748062B2 (ja) * | 1991-11-06 | 1998-05-06 | 富士写真フイルム株式会社 | ハロゲン化銀写真感光材料およびこれを用いた画像形成法 |
| JP2756520B2 (ja) * | 1991-11-15 | 1998-05-25 | 富士写真フイルム株式会社 | ハロゲン化銀写真感光材料 |
| EP0573649B1 (en) * | 1991-12-18 | 1999-04-07 | Fuji Photo Film Co., Ltd. | Silver halide photographic material |
| EP0572662B1 (en) * | 1991-12-18 | 1999-03-17 | Fuji Photo Film Co., Ltd. | Silver halide photographic material |
| EP0563708B1 (en) | 1992-03-19 | 2000-06-21 | Fuji Photo Film Co., Ltd. | Process for preparing a silver halide photographic emulsion |
| JP2811257B2 (ja) * | 1992-04-24 | 1998-10-15 | 富士写真フイルム株式会社 | ハロゲン化銀写真感光材料 |
| JP2824717B2 (ja) | 1992-07-10 | 1998-11-18 | 富士写真フイルム株式会社 | ハロゲン化銀写真感光材料の処理方法 |
| DE69329173T2 (de) | 1992-09-24 | 2001-01-11 | Fuji Photo Film Co., Ltd. | Verarbeitungsverfahren für lichtempfindliches silberhalogenidenthaltendes Schwarzweissmaterial |
| DE69426431T2 (de) * | 1993-04-07 | 2001-05-10 | Fuji Photo Film Co., Ltd. | Oberflächenlatentbildtyp Silberhalogenidemulsion |
| DE69516054T2 (de) | 1994-07-18 | 2000-10-26 | Konica Corp., Tokio/Tokyo | Photographisches Silberhalogenidelement und sein Verarbeitungsverfahren |
| US5616446A (en) * | 1994-09-29 | 1997-04-01 | Konica Corporation | Silver halide photographic light-sensitive material |
| JPH08190199A (ja) | 1994-10-18 | 1996-07-23 | Minnesota Mining & Mfg Co <3M> | 感光性エレメント |
| US5468588A (en) | 1994-10-18 | 1995-11-21 | Minnesota Mining And Manufacturing Company | Process for manufacturing diffusion transfer printing plates |
| JP3393271B2 (ja) * | 1994-12-14 | 2003-04-07 | コニカ株式会社 | ハロゲン化銀写真感光材料及びハロゲン化銀乳剤の増感方法 |
| JP3448724B2 (ja) | 1995-11-29 | 2003-09-22 | コニカ株式会社 | ハロゲン化銀写真感光材料用現像剤及びその処理方法 |
| WO2004068237A1 (ja) * | 2003-01-31 | 2004-08-12 | Konica Corporation | ハロゲン化銀乳剤、ハロゲン化銀写真感光材料及び画像形成方法 |
| JP2007041376A (ja) | 2005-08-04 | 2007-02-15 | Fujifilm Holdings Corp | ハロゲン化銀感光材料およびそれを包含する包装体 |
| WO2012035314A1 (en) | 2010-09-17 | 2012-03-22 | Fujifilm Manufacturing Europe Bv | Photographic paper |
| GB202006061D0 (en) | 2020-04-24 | 2020-06-10 | Fujifilm Mfg Europe Bv | Photographic paper |
-
1924
- 1924-06-06 US US718410A patent/US1574943A/en not_active Expired - Lifetime
- 1924-06-06 US US718411A patent/US1574944A/en not_active Expired - Lifetime
- 1924-06-06 US US718409A patent/US1600736A/en not_active Expired - Lifetime
-
1925
- 1925-06-03 FR FR599933D patent/FR599933A/fr not_active Expired
- 1925-06-03 FR FR599934D patent/FR599934A/fr not_active Expired
- 1925-06-03 FR FR599932D patent/FR599932A/fr not_active Expired
- 1925-06-04 DE DEE32600D patent/DE441934C/de not_active Expired
- 1925-06-04 DE DEE32601D patent/DE439372C/de not_active Expired
- 1925-06-04 DE DEE32599D patent/DE433043C/de not_active Expired
- 1925-06-05 GB GB14629/25A patent/GB235209A/en not_active Expired
- 1925-06-05 GB GB14630/25A patent/GB235210A/en not_active Expired
- 1925-06-06 NL NL30418A patent/NL21355C/xx active
-
1926
- 1926-01-21 US US82846A patent/US1602591A/en not_active Expired - Lifetime
- 1926-01-21 US US82845A patent/US1602590A/en not_active Expired - Lifetime
- 1926-01-21 US US82847A patent/US1602592A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| US1602592A (en) | 1926-10-12 |
| GB235209A (en) | 1926-12-06 |
| DE441934C (de) | 1927-03-18 |
| US1600736A (en) | 1926-09-21 |
| DE433043C (de) | 1926-08-24 |
| NL21355C (en:Method) | 1930-03-15 |
| US1574944A (en) | 1926-03-02 |
| US1602590A (en) | 1926-10-12 |
| DE439372C (de) | 1927-01-12 |
| US1574943A (en) | 1926-03-02 |
| FR599933A (fr) | 1926-01-25 |
| US1602591A (en) | 1926-10-12 |
| FR599934A (fr) | 1926-01-25 |
| FR599932A (fr) | 1926-01-25 |
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