BE398436A - - Google Patents
Info
- Publication number
- BE398436A BE398436A BE398436DA BE398436A BE 398436 A BE398436 A BE 398436A BE 398436D A BE398436D A BE 398436DA BE 398436 A BE398436 A BE 398436A
- Authority
- BE
- Belgium
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
- E04B1/82—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
- E04B1/84—Sound-absorbing elements
- E04B1/86—Sound-absorbing elements slab-shaped
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
- E04B2001/742—Use of special materials; Materials having special structures or shape
- E04B2001/747—Corrugated materials
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
- E04B1/82—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
- E04B1/84—Sound-absorbing elements
- E04B2001/8414—Sound-absorbing elements with non-planar face, e.g. curved, egg-crate shaped
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
- E04B1/82—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
- E04B1/84—Sound-absorbing elements
- E04B2001/8423—Tray or frame type panels or blocks, with or without acoustical filling
- E04B2001/8433—Tray or frame type panels or blocks, with or without acoustical filling with holes in their face
- E04B2001/8438—Slot shaped holes
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
- E04B1/82—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
- E04B1/84—Sound-absorbing elements
- E04B2001/8423—Tray or frame type panels or blocks, with or without acoustical filling
- E04B2001/8452—Tray or frame type panels or blocks, with or without acoustical filling with peripheral frame members
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
- E04B1/82—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
- E04B1/84—Sound-absorbing elements
- E04B2001/8457—Solid slabs or blocks
- E04B2001/8461—Solid slabs or blocks layered
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
- E04B1/82—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
- E04B1/84—Sound-absorbing elements
- E04B2001/8457—Solid slabs or blocks
- E04B2001/8461—Solid slabs or blocks layered
- E04B2001/8471—Solid slabs or blocks layered with non-planar interior transition surfaces between layers, e.g. faceted, corrugated
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
- E04B1/82—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
- E04B1/84—Sound-absorbing elements
- E04B2001/8457—Solid slabs or blocks
- E04B2001/8476—Solid slabs or blocks with acoustical cavities, with or without acoustical filling
- E04B2001/848—Solid slabs or blocks with acoustical cavities, with or without acoustical filling the cavities opening onto the face of the element
- E04B2001/8485—Solid slabs or blocks with acoustical cavities, with or without acoustical filling the cavities opening onto the face of the element the opening being restricted, e.g. forming Helmoltz resonators
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- 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
- Y10S138/00—Pipes and tubular conduits
- Y10S138/04—Air conditioning
-
- 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
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24273—Structurally defined web or sheet [e.g., overall dimension, etc.] including aperture
- Y10T428/24281—Struck out portion type
-
- 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
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24273—Structurally defined web or sheet [e.g., overall dimension, etc.] including aperture
- Y10T428/24322—Composite web or sheet
-
- 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
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24355—Continuous and nonuniform or irregular surface on layer or component [e.g., roofing, etc.]
-
- 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
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24628—Nonplanar uniform thickness material
- Y10T428/24661—Forming, or cooperating to form cells
-
- 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
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24628—Nonplanar uniform thickness material
- Y10T428/24669—Aligned or parallel nonplanarities
- Y10T428/24694—Parallel corrugations
-
- 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
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24628—Nonplanar uniform thickness material
- Y10T428/24669—Aligned or parallel nonplanarities
- Y10T428/24694—Parallel corrugations
- Y10T428/24711—Plural corrugated components
-
- 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
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24628—Nonplanar uniform thickness material
- Y10T428/24669—Aligned or parallel nonplanarities
- Y10T428/24694—Parallel corrugations
- Y10T428/24711—Plural corrugated components
- Y10T428/24727—Plural corrugated components with planar component
Landscapes
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Electromagnetism (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Building Environments (AREA)
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US623799A US2132642A (en) | 1932-07-21 | 1932-07-21 | Sound absorbing unit |
US623731A US2043987A (en) | 1932-07-21 | 1932-07-21 | Structural unit |
US658937A US2043988A (en) | 1932-07-21 | 1933-02-28 | Lightweight unit |
BE398436T | 1933-08-02 | ||
FR762525T | 1933-08-31 |
Publications (1)
Publication Number | Publication Date |
---|---|
BE398436A true BE398436A (fr) | 1933-09-30 |
Family
ID=24499200
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BE398436D BE398436A (fr) | 1932-07-21 | 1933-08-02 |
Country Status (3)
Country | Link |
---|---|
US (3) | US2132642A (fr) |
BE (1) | BE398436A (fr) |
FR (1) | FR762525A (fr) |
Families Citing this family (53)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2474709A (en) * | 1943-12-16 | 1949-06-28 | Stewart Warner Corp | Heating system |
US2758047A (en) * | 1953-09-17 | 1956-08-07 | Dowd Alfred | Flexible corrugated wrapping sheet |
US2826261A (en) * | 1956-08-30 | 1958-03-11 | Oliver C Eckel | Acoustical control apparatus |
US3168432A (en) * | 1961-12-22 | 1965-02-02 | Thore M Elfving | Core material |
US3362867A (en) * | 1964-07-06 | 1968-01-09 | Midland Ross Corp | Lading pallet of laminated construction |
US3384199A (en) * | 1965-08-13 | 1968-05-21 | Oliver C. Eckel | Acoustical control apparatus |
US3380206A (en) * | 1965-09-29 | 1968-04-30 | Soundlock Corp | Lay-in acoustical ceiling panel with flexible diaphragms |
US3507634A (en) * | 1965-10-22 | 1970-04-21 | United Aircraft Corp | Composite metal structure |
US3483944A (en) * | 1966-09-09 | 1969-12-16 | John W Handy Jr | Acoustic structure |
US3466019A (en) * | 1967-08-04 | 1969-09-09 | Ronald Priestley | Gas-liquid contact packing sheets |
US3661721A (en) * | 1971-02-05 | 1972-05-09 | Pactide Corp | Compact multistage distillation apparatus having stacked microporous membranes and impermeable films |
US4232093A (en) * | 1973-10-29 | 1980-11-04 | Summa Corporation | High temperature skin construction |
DE2408028B2 (de) * | 1974-02-20 | 1978-05-11 | Fa. Carl Freudenberg, 6940 Weinheim | Schallschluckplatte |
FR2315054A1 (fr) * | 1975-06-16 | 1977-01-14 | Commissariat Energie Atomique | Panneau calorifuge etanche |
US4838524A (en) * | 1987-09-08 | 1989-06-13 | Cyclops Corporation | Noise barrier |
US5157893A (en) * | 1988-04-15 | 1992-10-27 | Midwest Research Institute | Compact vacuum insulation |
US5057176A (en) * | 1988-05-10 | 1991-10-15 | Manville Corporation | Method of forming corrugated paperboard automotive liner |
US4886696A (en) * | 1988-05-10 | 1989-12-12 | Manville Corporation | Corrugated paperboard automotive liner |
US5394786A (en) * | 1990-06-19 | 1995-03-07 | Suppression Systems Engineering Corp. | Acoustic/shock wave attenuating assembly |
US5225622A (en) * | 1990-06-19 | 1993-07-06 | Guy L. Gettle | Acoustic/shock wave attenuating assembly |
US5325893A (en) * | 1991-10-04 | 1994-07-05 | Tokushu Paper Mfg. Co., Ltd. | Air duct and paper therefor |
US5212355A (en) * | 1991-10-18 | 1993-05-18 | Hollanding Inc. | Sound absorptive file cabinet door |
DE9310221U1 (de) * | 1993-07-09 | 1994-01-27 | Graf, Volker, 76467 Bietigheim | Dämmkörper |
SE506188C2 (sv) * | 1996-01-25 | 1997-11-17 | Dale Edward Knipstein | Ljudabsorberande element samt förfarande för framställning av detta element samt användning av elementet |
US5926366A (en) * | 1996-11-15 | 1999-07-20 | Digital Equipment Corporation | Tab and slot disk drive vibration reduction structure |
US5858509A (en) * | 1996-11-15 | 1999-01-12 | Digital Equipment Corporation | Attenuating vibrations in a mounting shelf for multiple disk drives |
AU4218399A (en) * | 1998-06-01 | 1999-12-20 | Herman Miller, Inc. | Modular furniture system |
DE20319319U1 (de) * | 2003-12-12 | 2005-04-28 | Carcoustics Tech Center Gmbh | Schallabsorbierendes Hitzeschild |
US7207310B2 (en) * | 2005-07-01 | 2007-04-24 | Visteon Global Technologies, Inc. | Noise attenuation device for an air induction system |
FR2889616B1 (fr) * | 2005-08-02 | 2008-05-30 | Hutchinson Sa | Panneau acoustique du type a lame d'air |
US20110100747A1 (en) * | 2006-05-24 | 2011-05-05 | Airbus Operations Gmbh | Sandwich element for the sound-absorbing inner cladding of means of transport, especially for the sound-absorbing inner cladding of aircraft |
US20090090580A1 (en) * | 2006-05-24 | 2009-04-09 | Airbus Deutschland Gmbh | Sandwich Element for the Sound-Absorbing Inner Cladding of Means of Transport, Especially for the Sound-Absorbing Inner Cladding of Aircraft |
US8100225B2 (en) * | 2006-09-13 | 2012-01-24 | Nucore Technologies Inc. | Room dampening panel |
CA2688470A1 (fr) * | 2009-12-11 | 2011-06-11 | Allan Manninen | Tissu industriel fait d'une pellicule gaufree munie de fentes selectives |
US8490338B2 (en) * | 2010-02-26 | 2013-07-23 | Henkel Corporation | Self adhering window flashing tape with multi-directional drainage plane |
US8251175B1 (en) | 2011-04-04 | 2012-08-28 | Usg Interiors, Llc | Corrugated acoustical panel |
US8511429B1 (en) * | 2012-02-13 | 2013-08-20 | Usg Interiors, Llc | Ceiling panels made from corrugated cardboard |
CA2779131A1 (fr) * | 2012-06-07 | 2013-12-07 | Allan R. MANNINEN | Pellicules gaufrees munies de fentes selectives et resistantes a la compression et textiles industriels composes de celles-ci |
US9212485B2 (en) * | 2012-07-13 | 2015-12-15 | Victor Wolynski | Modular building panel |
US9194119B2 (en) * | 2012-10-04 | 2015-11-24 | ST Global Partners, LLC | Peel and stick decoupling membrane |
DE102014202477A1 (de) * | 2014-02-11 | 2015-08-13 | Leena Rose Wilson | Akustischer Absorber und Verwendung eines derartigen akustischen Absorbers |
FR3018384B1 (fr) * | 2014-03-04 | 2016-03-11 | Scherrer Jean Marc | Ensemble d'absorption acoustique a hautes et basses frequences |
CA164757S (en) * | 2015-10-07 | 2016-06-21 | Groupe Isolofoam Inc | Insulation panel |
CA165227S (en) * | 2015-11-04 | 2018-11-26 | Comitale Joe | Membrane |
CN108604111B (zh) * | 2015-12-22 | 2021-11-12 | 雷蛇(亚太)私人有限公司 | 网格组件、计算系统及制造网格组件的方法 |
US10134379B2 (en) * | 2016-03-01 | 2018-11-20 | Guardian Glass, LLC | Acoustic wall assembly having double-wall configuration and passive noise-disruptive properties, and/or method of making and/or using the same |
US10354638B2 (en) | 2016-03-01 | 2019-07-16 | Guardian Glass, LLC | Acoustic wall assembly having active noise-disruptive properties, and/or method of making and/or using the same |
US10304473B2 (en) | 2017-03-15 | 2019-05-28 | Guardian Glass, LLC | Speech privacy system and/or associated method |
US10373626B2 (en) | 2017-03-15 | 2019-08-06 | Guardian Glass, LLC | Speech privacy system and/or associated method |
US10726855B2 (en) | 2017-03-15 | 2020-07-28 | Guardian Glass, Llc. | Speech privacy system and/or associated method |
TWI669430B (zh) * | 2018-10-31 | 2019-08-21 | 許翃銘 | Sound-absorbing panels |
US11666199B2 (en) | 2018-12-12 | 2023-06-06 | Owens Corning Intellectual Capital, Llc | Appliance with cellulose-based insulator |
US11207863B2 (en) | 2018-12-12 | 2021-12-28 | Owens Corning Intellectual Capital, Llc | Acoustic insulator |
-
1932
- 1932-07-21 US US623799A patent/US2132642A/en not_active Expired - Lifetime
- 1932-07-21 US US623731A patent/US2043987A/en not_active Expired - Lifetime
-
1933
- 1933-02-28 US US658937A patent/US2043988A/en not_active Expired - Lifetime
- 1933-08-02 BE BE398436D patent/BE398436A/xx unknown
- 1933-08-31 FR FR762525D patent/FR762525A/fr not_active Expired
Also Published As
Publication number | Publication date |
---|---|
US2043988A (en) | 1936-06-16 |
US2043987A (en) | 1936-06-16 |
FR762525A (fr) | 1934-04-11 |
US2132642A (en) | 1938-10-11 |