| Patents for F42D 1 - Blasting methods or apparatus, e.g. for loading or tamping (4,148) |
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| 11/20/1990 | US4970956 For use with an underwater explosive system |
| 11/15/1990 | WO1990013788A1 A method and apparatus for charging waterlogged boreholes with explosives material |
| 11/06/1990 | CA1275856C Non-electric blasting initiation signal control system, method and transmission device therefor |
| 10/30/1990 | US4967048 Safety switch for explosive well tools |
| 10/30/1990 | US4966077 Loading of boreholes with explosive |
| 10/23/1990 | US4964329 Sound attenuation with foam |
| 10/16/1990 | US4962708 High explosive detonation apparatus |
| 10/09/1990 | US4961381 Primer centering device for large diameter blastholes |
| 09/12/1990 | EP0386860A2 Detonating primer having delay circuit and system for electrically blasting detonating primers |
| 09/12/1990 | EP0386012A1 Triggering circuit for a vehicle air bag. |
| 09/05/1990 | EP0385614A2 Connection device for blasting signal transmission tubing |
| 09/04/1990 | US4953464 Multi-directional signal transmission in a blast initiation system |
| 09/01/1990 | CA2011056A1 Connection device for blasting signal transmission tubing |
| 08/21/1990 | CA1273086A1 Electrical sequential firing system |
| 08/14/1990 | US4947751 Multi-directional initiator for explosives |
| 08/14/1990 | CA1272783A1 Detonator actuator |
| 08/08/1990 | CN2060217U Detonator sparking gear |
| 08/07/1990 | US4945808 Primer |
| 07/30/1990 | CA2008933A1 Sequential activation of explosions |
| 07/25/1990 | CN2059732U Multipoint explosive propagation system for plastic booster |
| 07/12/1990 | WO1990007689A1 Method and apparatus for detonating explosives |
| 07/03/1990 | US4938141 Shock initiator device for initiating a percussion primer |
| 06/19/1990 | US4934270 Low energy fuse multi-connector |
| 06/01/1990 | CA2003705A1 Dual firing system for a perforating gun |
| 05/15/1990 | US4924774 Apparatus for igniting a pyrotechnic transmission line |
| 05/01/1990 | US4920883 Detonation transfer methods and apparatus |
| 04/25/1990 | CN2056502U Initiating device for fixed point laser telecontrol |
| 04/24/1990 | US4919203 Methods and apparatus for field blasting of earth formations using inflatable devices for suspending explosives in bore holes |
| 04/03/1990 | US4913233 Methods of field blasting of earth formations using inflatable devices for suspending explosives in boreholes |
| 03/22/1990 | WO1990002673A1 Apparatus for triggering a vehicle safety system |
| 03/22/1990 | WO1990002672A1 Triggering circuit for a vehicle air bag |
| 03/21/1990 | CN2054871U Single-hole guide detonator |
| 03/08/1990 | WO1990002062A1 Electronic device and mode of operation |
| 03/06/1990 | CA1266522A1 Ignition system |
| 02/27/1990 | US4903772 Surrounding a cased well bore |
| 02/22/1990 | WO1990001610A1 Safety switch for explosive well tools |
| 02/21/1990 | CN1039896A Super-industrial frequency initiation device |
| 01/24/1990 | CN2051670U Covered-barrel explosive and the loading tube thereof |
| 01/17/1990 | CN1006444B Intermittent explosion device |
| 12/13/1989 | CN1006087B Demolition device with liquid explosive |
| 12/12/1989 | US4886126 Method and apparatus for firing a perforating gun |
| 12/12/1989 | US4885993 Shaped charge with bifurcated projection for detonating cord |
| 12/05/1989 | US4884506 Remote detonation of explosive charges |
| 11/16/1989 | DE3815447A1 Detonating device for flameproof detonation of a plurality of parallel-connected bridge-wire detonators with the aid of a capacitor machine |
| 11/14/1989 | US4879952 Primer |
| 11/09/1989 | DE3814746A1 System zur verspannung einer sprengladung in einem bohrloch System for stress busting a charge in a borehole |
| 11/02/1989 | EP0339774A2 Firing head for well perforating gun |
| 10/25/1989 | EP0338707A1 Method and apparatus for loading explosives into boreholes |
| 10/17/1989 | US4873928 Nuclear-sized explosions without radiation |
| 10/03/1989 | US4870903 Photopyrotechnical detonation device and photopyrotechnical chain using this device |
| 09/27/1989 | CN2045101U Special fusing powdered roll for light detonation |
| 09/26/1989 | US4869173 Blasting plug with plate members and plastic resin |
| 09/26/1989 | US4869171 Detonator |
| 09/26/1989 | CA1261675A1 Detonation arrestor device for bulk explosive materials transfer |
| 09/26/1989 | CA1259854A1 Smooth wall blasting in rock |
| 09/12/1989 | US4864933 Method of rock breakage by blasting |
| 09/06/1989 | EP0331399A1 A method of fragmentation blasting |
| 08/29/1989 | US4860653 Detonator actuator |
| 08/16/1989 | CN1034802A Explosive strip |
| 08/09/1989 | EP0327211A2 Multi-directional initiator for explosives |
| 08/01/1989 | USRE33004 Apparatus and method for selectively activating plural electrical loads at predetermined relative times |
| 08/01/1989 | US4852495 Shaped charge detonating cord retainer arrangement |
| 08/01/1989 | US4852493 Ferrite core coupled slapper detonator apparatus and method |
| 07/27/1989 | WO1989006780A1 Improvements in or relating to explosives |
| 07/26/1989 | CN1034265A Method for controlling blasting operations |
| 07/18/1989 | US4848232 Method of electrically blasting a plurality of detonators and electric blasting apparatus for use in said method |
| 07/12/1989 | EP0323687A1 Method of measuring, analysing, predicting and controlling vibrations induced by explosive blasting in earth formations |
| 07/12/1989 | CN1033875A Apparatus of blasting undersea rocks |
| 07/11/1989 | US4846066 Detonator system |
| 06/27/1989 | CA1256305A1 Methods of pumping and loading emulsion slurry blasting compositions |
| 06/07/1989 | CN2039011U Plastic demolishing explosive tube |
| 06/06/1989 | US4836109 Control line differential firing head |
| 05/16/1989 | US4829902 Method for charging flowable explosives into upwardly extending boreholes |
| 05/02/1989 | US4825765 Delay circuit for electric blasting, detonating primer having delay circuit and system for electrically blasting detonating primers |
| 05/02/1989 | US4825764 Connecting device between a firing fuse of a pyrotechnic product and an igniter |
| 04/18/1989 | US4821645 Multi-directional signal transmission in a blast initiation system |
| 04/18/1989 | CA1252853A1 Remotely controlled firing of ignition elements |
| 03/28/1989 | US4815382 Connector and detonator/connector assembly for initiating explosive primers with low-energy detonating cord |
| 03/21/1989 | US4813358 Inflatable wand for loading a mining borehole |
| 03/14/1989 | USRE32888 Apparatus and method for selectively activating plural electrical loads at predetermined relative times |
| 02/14/1989 | CA1250018A1 Controlled inductive coupling device |
| 02/01/1989 | EP0301848A2 Blasting system and components therefor |
| 02/01/1989 | CN1030826A Sequential igniting apparatus with short fuse |
| 01/24/1989 | US4799428 Explosive primer unit for instantaneous initiation by low-energy detonating cord |
| 01/18/1989 | EP0299278A2 Multi-directional signal transmission in a blast initiation system |
| 01/18/1989 | CN2031080U Intellectual faculties ignitor |
| 01/18/1989 | CN1030473A Large separation distance open-air type powder chamber blasting method |
| 01/10/1989 | US4796533 Primer assembly |
| 01/10/1989 | US4796531 Mining method |
| 12/21/1988 | EP0296053A1 Pyrotechnic network |
| 12/21/1988 | EP0296015A1 Power line impedance testing appliance, and its use in a pyrotecnical device firing test |
| 12/13/1988 | US4790385 Method and apparatus for perforating subsurface earth formations |
| 11/23/1988 | EP0292383A1 Photopyrotechnic priming device, and photopyrotechnic chain using such a device |
| 11/01/1988 | CA1244116A1 Blasting initiated control system |
| 10/25/1988 | US4780027 In a pressure pot system |
| 10/18/1988 | US4778009 Shock actuated switch for perforating gun assembly |
| 10/18/1988 | US4777880 Blasting method with above and below surface delays |
| 10/11/1988 | US4776276 Cast explosive primer initiatable by low-energy detonating cord |
| 09/20/1988 | US4771694 Blasting signal transmission tube connector |
| 09/14/1988 | EP0281722A1 A blasting system for underwater use |