GB1230441A - - Google Patents
Info
- Publication number
- GB1230441A GB1230441A GB1230441DA GB1230441A GB 1230441 A GB1230441 A GB 1230441A GB 1230441D A GB1230441D A GB 1230441DA GB 1230441 A GB1230441 A GB 1230441A
- Authority
- GB
- United Kingdom
- Prior art keywords
- current
- load
- primary
- energy
- inductor
- 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
- 239000003990 capacitor Substances 0.000 abstract 5
- 238000004804 winding Methods 0.000 abstract 4
- 230000004907 flux Effects 0.000 abstract 2
- 238000007599 discharging Methods 0.000 abstract 1
- 230000001939 inductive effect Effects 0.000 abstract 1
- 230000001105 regulatory effect Effects 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of DC power input into DC power output
- H02M3/22—Conversion of DC power input into DC power output with intermediate conversion into AC
- H02M3/24—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters
- H02M3/28—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/10—Regulating voltage or current
- G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is DC
- G05F1/62—Regulating voltage or current wherein the variable actually regulated by the final control device is DC using bucking or boosting DC sources
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of DC power input into DC power output
- H02M3/22—Conversion of DC power input into DC power output with intermediate conversion into AC
- H02M3/24—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters
- H02M3/28—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC
- H02M3/325—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33569—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of DC power input into DC power output
- H02M3/22—Conversion of DC power input into DC power output with intermediate conversion into AC
- H02M3/24—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters
- H02M3/28—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC
- H02M3/325—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33569—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
- H02M3/33573—Full-bridge at primary side of an isolation transformer
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of DC power input into DC power output
- H02M3/22—Conversion of DC power input into DC power output with intermediate conversion into AC
- H02M3/24—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters
- H02M3/28—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC
- H02M3/325—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/337—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only in push-pull configuration
- H02M3/3376—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only in push-pull configuration with automatic control of output voltage or current
- H02M3/3378—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only in push-pull configuration with automatic control of output voltage or current in a push-pull configuration of the parallel type
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Automation & Control Theory (AREA)
- Dc-Dc Converters (AREA)
- Inverter Devices (AREA)
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US66776267A | 1967-09-14 | 1967-09-14 | |
| US66769867A | 1967-09-14 | 1967-09-14 | |
| US69199667A | 1967-12-20 | 1967-12-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1230441A true GB1230441A (enExample) | 1971-05-05 |
Family
ID=27418173
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1230441D Expired GB1230441A (enExample) | 1967-09-14 | 1968-08-26 |
Country Status (4)
| Country | Link |
|---|---|
| US (3) | US3443195A (enExample) |
| DE (1) | DE1763820A1 (enExample) |
| FR (2) | FR1579202A (enExample) |
| GB (1) | GB1230441A (enExample) |
Families Citing this family (94)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3490028A (en) * | 1968-07-24 | 1970-01-13 | Hughes Aircraft Co | Power supply energy transformation apparatus |
| US3573597A (en) * | 1969-12-29 | 1971-04-06 | Gen Electric | High current switching regulator with overlapped output current pulses |
| US3967181A (en) * | 1970-05-06 | 1976-06-29 | Raytheon Company | Converter wherein switching frequency is independent of output voltage and is synchronized to an external system |
| US3624483A (en) * | 1970-08-24 | 1971-11-30 | Honeywell Inf Systems | Switching regulator using low-voltage diodes |
| US3740640A (en) * | 1970-10-08 | 1973-06-19 | Westinghouse Electric Corp | Radar power supply |
| US3846691A (en) * | 1971-02-24 | 1974-11-05 | Westinghouse Electric Corp | Direct current to direct current chopper inverter |
| JPS5136656Y2 (enExample) * | 1971-06-30 | 1976-09-08 | ||
| US3737756A (en) * | 1972-05-15 | 1973-06-05 | Bell Telephone Labor Inc | Converter circuit with balanced parallel switching paths |
| US4021717A (en) * | 1973-05-16 | 1977-05-03 | Matsushita Electric Industrial Co., Ltd. | Charging system |
| JPS553906B2 (enExample) * | 1974-07-15 | 1980-01-28 | ||
| US3987355A (en) * | 1975-03-24 | 1976-10-19 | Tektronix, Inc. | High efficiency switching drive for a resonate power transformer |
| US3967182A (en) * | 1975-06-20 | 1976-06-29 | Rca Corporation | Regulated switched mode multiple output power supply |
| US4035710A (en) * | 1975-10-20 | 1977-07-12 | International Business Machines Corporation | Pulse width modulated voltage regulator-converter/power converter having means for improving the static stability characteristics thereof |
| JPS5290201A (en) * | 1976-01-23 | 1977-07-29 | Sony Corp | Input circuit |
| JPS585590B2 (ja) * | 1977-07-29 | 1983-01-31 | 東光株式会社 | 電力制御回路 |
| JPS5953787B2 (ja) * | 1977-11-22 | 1984-12-26 | ソニー株式会社 | スイツチング方式安定化電源回路 |
| DE3020745C2 (de) * | 1980-05-31 | 1985-10-10 | ANT Nachrichtentechnik GmbH, 7150 Backnang | Fremdgesteuerter Gleichspannungswandler |
| US4318166A (en) * | 1980-06-26 | 1982-03-02 | Litton Systems, Inc. | Optimum topology high voltage DC to DC converter |
| US4408267A (en) * | 1981-01-08 | 1983-10-04 | Rca Corporation | DC-to-DC Switching converters |
| GB2152770B (en) * | 1983-11-15 | 1987-04-29 | Yokogawa Hokushin Electric | Dc/dc converter |
| ATE46233T1 (de) * | 1984-05-10 | 1989-09-15 | Siemens Ag | Schaltungsanordnung fuer umrichter. |
| US4713740A (en) * | 1984-07-27 | 1987-12-15 | Sms Advanced Power, Inc. | Switch-mode power supply |
| FR2573936B1 (fr) * | 1984-11-23 | 1992-04-10 | Auxilec | Convertisseur continu-continu a commutateur de decoupage et transformateur |
| US4675796A (en) * | 1985-05-17 | 1987-06-23 | Veeco Instruments, Inc. | High switching frequency converter auxiliary magnetic winding and snubber circuit |
| US4803609A (en) * | 1985-10-31 | 1989-02-07 | International Business Machines Corporation | D. C. to D. C. converter |
| US4767978A (en) * | 1986-04-25 | 1988-08-30 | Halliburton Company | Hybrid switching circuit in a DC to DC converter |
| US4806834A (en) * | 1987-04-16 | 1989-02-21 | Donald Goodman | Electrical circuit for inductance conductors, transformers and motors |
| US4821163A (en) * | 1987-12-23 | 1989-04-11 | Bloom Gordon E | Start-up circuit for an integrated-magnetic power converter |
| US4853668A (en) * | 1987-12-23 | 1989-08-01 | Bloom Gordon E | Integrated magnetic converter core |
| US4864478A (en) * | 1987-12-23 | 1989-09-05 | Bloom Gordon E | Integrated-magnetics power converter |
| US4858093A (en) * | 1988-12-12 | 1989-08-15 | Qualitron, Inc. | Integrated magnetic power converter |
| US4961128A (en) * | 1988-12-28 | 1990-10-02 | Zenith Electronics Corporation | Push-pull zero-ripple IM converter system |
| US5038263A (en) * | 1990-01-03 | 1991-08-06 | Eg&G Power Systems, Inc. | Ripple current reduction circuit |
| US5187428A (en) * | 1991-02-26 | 1993-02-16 | Miller Electric Mfg. Co. | Shunt coil controlled transformer |
| US5672963A (en) * | 1991-02-26 | 1997-09-30 | Illinois Tool Works Inc. | Variable induction control led transformer |
| US5181170A (en) * | 1991-12-26 | 1993-01-19 | Wisconsin Alumni Research Foundation | High efficiency DC/DC current source converter |
| US5208739A (en) * | 1992-01-07 | 1993-05-04 | Powercube Corporation | Integrated magnetic power converter |
| US5440472A (en) * | 1994-02-14 | 1995-08-08 | Powercube Corporation | Integrated magnetic power converter |
| DE69627909T2 (de) | 1995-01-17 | 2003-11-13 | Vlt Corp | Regelung der in den Transformatoren von Schaltnetzteilen gepseicherten Energie |
| US5684683A (en) * | 1996-02-09 | 1997-11-04 | Wisconsin Alumni Research Foundation | DC-to-DC power conversion with high current output |
| US5781419A (en) * | 1996-04-12 | 1998-07-14 | Soft Switching Technologies, Inc. | Soft switching DC-to-DC converter with coupled inductors |
| US5999417A (en) * | 1997-01-24 | 1999-12-07 | Fische, Llc | High efficiency power converter |
| US7269034B2 (en) | 1997-01-24 | 2007-09-11 | Synqor, Inc. | High efficiency power converter |
| US5920473A (en) * | 1998-03-09 | 1999-07-06 | Magnetic Technology, Inc. | Dc-to-Dc power converter with integrated magnetic power transformer |
| WO2003032477A2 (en) * | 2001-10-12 | 2003-04-17 | Northeastern University | Integrated magnetics for a dc-dc converter with flexible output inductor |
| US7280026B2 (en) * | 2002-04-18 | 2007-10-09 | Coldwatt, Inc. | Extended E matrix integrated magnetics (MIM) core |
| US6952353B2 (en) | 2003-02-04 | 2005-10-04 | Northeastern University | Integrated magnetic isolated two-inductor boost converter |
| US7417875B2 (en) * | 2005-02-08 | 2008-08-26 | Coldwatt, Inc. | Power converter employing integrated magnetics with a current multiplier rectifier and method of operating the same |
| US7876191B2 (en) * | 2005-02-23 | 2011-01-25 | Flextronics International Usa, Inc. | Power converter employing a tapped inductor and integrated magnetics and method of operating the same |
| US9048022B2 (en) * | 2006-08-28 | 2015-06-02 | Youngtack Shim | Electromagnetically-countered transformer systems and methods |
| US8125205B2 (en) * | 2006-08-31 | 2012-02-28 | Flextronics International Usa, Inc. | Power converter employing regulators with a coupled inductor |
| US7667986B2 (en) * | 2006-12-01 | 2010-02-23 | Flextronics International Usa, Inc. | Power system with power converters having an adaptive controller |
| US7889517B2 (en) * | 2006-12-01 | 2011-02-15 | Flextronics International Usa, Inc. | Power system with power converters having an adaptive controller |
| US7675759B2 (en) | 2006-12-01 | 2010-03-09 | Flextronics International Usa, Inc. | Power system with power converters having an adaptive controller |
| US7675758B2 (en) | 2006-12-01 | 2010-03-09 | Flextronics International Usa, Inc. | Power converter with an adaptive controller and method of operating the same |
| US9197132B2 (en) | 2006-12-01 | 2015-11-24 | Flextronics International Usa, Inc. | Power converter with an adaptive controller and method of operating the same |
| US7468649B2 (en) * | 2007-03-14 | 2008-12-23 | Flextronics International Usa, Inc. | Isolated power converter |
| US7906941B2 (en) * | 2007-06-19 | 2011-03-15 | Flextronics International Usa, Inc. | System and method for estimating input power for a power processing circuit |
| WO2009049076A1 (en) * | 2007-10-09 | 2009-04-16 | Particle Drilling Technologies, Inc. | Injection system and method |
| US7777458B2 (en) * | 2007-12-04 | 2010-08-17 | Barthold Fred O | DC-DC converter |
| US8520414B2 (en) * | 2009-01-19 | 2013-08-27 | Power Systems Technologies, Ltd. | Controller for a power converter |
| WO2010083514A1 (en) | 2009-01-19 | 2010-07-22 | Flextronics International Usa, Inc. | Controller for a power converter |
| CN102356438B (zh) | 2009-03-31 | 2014-08-27 | 伟创力国际美国公司 | 使用u形芯件形成的磁器件以及运用该器件的功率转换器 |
| US8643222B2 (en) | 2009-06-17 | 2014-02-04 | Power Systems Technologies Ltd | Power adapter employing a power reducer |
| US9077248B2 (en) | 2009-06-17 | 2015-07-07 | Power Systems Technologies Ltd | Start-up circuit for a power adapter |
| US8514593B2 (en) * | 2009-06-17 | 2013-08-20 | Power Systems Technologies, Ltd. | Power converter employing a variable switching frequency and a magnetic device with a non-uniform gap |
| US8638578B2 (en) | 2009-08-14 | 2014-01-28 | Power System Technologies, Ltd. | Power converter including a charge pump employable in a power adapter |
| US8976549B2 (en) * | 2009-12-03 | 2015-03-10 | Power Systems Technologies, Ltd. | Startup circuit including first and second Schmitt triggers and power converter employing the same |
| US8520420B2 (en) * | 2009-12-18 | 2013-08-27 | Power Systems Technologies, Ltd. | Controller for modifying dead time between switches in a power converter |
| US9246391B2 (en) | 2010-01-22 | 2016-01-26 | Power Systems Technologies Ltd. | Controller for providing a corrected signal to a sensed peak current through a circuit element of a power converter |
| US8787043B2 (en) * | 2010-01-22 | 2014-07-22 | Power Systems Technologies, Ltd. | Controller for a power converter and method of operating the same |
| CN102870320B (zh) | 2010-03-17 | 2016-11-02 | 电力系统技术有限公司 | 功率转换器的控制系统及其操作方法 |
| US20110239008A1 (en) * | 2010-03-26 | 2011-09-29 | Lam Kean W | Power Adapter Having a Universal Serial Bus Hub |
| US8792257B2 (en) | 2011-03-25 | 2014-07-29 | Power Systems Technologies, Ltd. | Power converter with reduced power dissipation |
| US8792256B2 (en) | 2012-01-27 | 2014-07-29 | Power Systems Technologies Ltd. | Controller for a switch and method of operating the same |
| US9190898B2 (en) | 2012-07-06 | 2015-11-17 | Power Systems Technologies, Ltd | Controller for a power converter and method of operating the same |
| US9379629B2 (en) | 2012-07-16 | 2016-06-28 | Power Systems Technologies, Ltd. | Magnetic device and power converter employing the same |
| US9214264B2 (en) | 2012-07-16 | 2015-12-15 | Power Systems Technologies, Ltd. | Magnetic device and power converter employing the same |
| US9099232B2 (en) | 2012-07-16 | 2015-08-04 | Power Systems Technologies Ltd. | Magnetic device and power converter employing the same |
| US9106130B2 (en) | 2012-07-16 | 2015-08-11 | Power Systems Technologies, Inc. | Magnetic device and power converter employing the same |
| US9240712B2 (en) | 2012-12-13 | 2016-01-19 | Power Systems Technologies Ltd. | Controller including a common current-sense device for power switches of a power converter |
| KR101444371B1 (ko) * | 2013-01-18 | 2014-09-24 | (주)테라에너지시스템 | 전자기 유도 방식 전원 공급 장치 |
| US20140266535A1 (en) * | 2013-03-14 | 2014-09-18 | Hiq Solar, Inc. | Low loss inductor with offset gap and windings |
| US9991043B2 (en) | 2013-03-15 | 2018-06-05 | General Electric Company | Integrated magnetic assemblies and methods of assembling same |
| US9251945B2 (en) | 2013-04-09 | 2016-02-02 | Fred O. Barthold | Planar core with high magnetic volume utilization |
| US10199950B1 (en) | 2013-07-02 | 2019-02-05 | Vlt, Inc. | Power distribution architecture with series-connected bus converter |
| US9300206B2 (en) | 2013-11-15 | 2016-03-29 | Power Systems Technologies Ltd. | Method for estimating power of a power converter |
| US9620280B2 (en) * | 2014-01-06 | 2017-04-11 | William Alek | Energy management system |
| US9438099B2 (en) | 2014-01-09 | 2016-09-06 | Fred O. Barthold | Harmonic displacement reduction |
| KR101459336B1 (ko) * | 2014-03-04 | 2014-11-07 | (주)테라에너지시스템 | 단위 변류기 유닛 및 이를 이용한 출력 전력을 선형적으로 조절하기 위한 전자기 유도 방식 전원 공급 장치 |
| US10910150B2 (en) * | 2015-11-30 | 2021-02-02 | Intel Corporation | Reconfigurable coupled inductor |
| US10438739B2 (en) * | 2016-05-04 | 2019-10-08 | Toyota Motor Engineering & Manufacturing North America, Inc. | Transformer with integrated leakage inductance |
| US10186949B1 (en) | 2017-11-09 | 2019-01-22 | International Business Machines Corporation | Coupled-inductor DC-DC power converter |
| CN116567906B (zh) * | 2023-06-26 | 2024-01-30 | 江苏神州半导体科技有限公司 | 一种等离子系统的点火电路结构及点火保护方法 |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1593357A (en) * | 1925-08-26 | 1926-07-20 | Gen Electric | Electric system |
| US3164767A (en) * | 1961-04-10 | 1965-01-05 | Gen Electric | Synchronization and lockout control system for controlled rectifiers |
| US3303405A (en) * | 1963-08-01 | 1967-02-07 | Gen Electric | Frequency modulated self-stabilizing inverter |
| US3389322A (en) * | 1965-07-28 | 1968-06-18 | Westinghouse Electric Corp | Direct current chopper circuit |
-
0
- FR FR9522A patent/FR96147E/fr not_active Expired
-
1967
- 1967-09-14 US US667762A patent/US3443195A/en not_active Expired - Lifetime
- 1967-09-14 US US667698A patent/US3443194A/en not_active Expired - Lifetime
- 1967-12-20 US US691996A patent/US3553620A/en not_active Expired - Lifetime
-
1968
- 1968-08-16 DE DE19681763820 patent/DE1763820A1/de active Pending
- 1968-08-19 FR FR1579202D patent/FR1579202A/fr not_active Expired
- 1968-08-26 GB GB1230441D patent/GB1230441A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE1763820A1 (de) | 1971-12-30 |
| FR1579202A (enExample) | 1969-08-22 |
| FR96147E (fr) | 1972-05-19 |
| DE1813009B2 (de) | 1977-03-10 |
| US3553620A (en) | 1971-01-05 |
| US3443194A (en) | 1969-05-06 |
| DE1813009A1 (de) | 1969-07-03 |
| US3443195A (en) | 1969-05-06 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed [section 19, patents act 1949] | ||
| PLNP | Patent lapsed through nonpayment of renewal fees |