| Patents for B23P 15 - Making specific metal objects by operations not covered by a single other subclass or a group in this subclass (23,391) |
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| 08/28/1991 | EP0298109B1 Plate heat exchanger with identical frame plate and pressure plate |
| 08/27/1991 | US5042330 Key manufacturing method |
| 08/22/1991 | WO1991012445A1 Cold-formed piston for hydraulically operated brake |
| 08/22/1991 | DE4004932A1 Radial fluid pressure motor - has cam and roller operated pistons with piston ring at piston base carrying turning moment |
| 08/21/1991 | EP0441887A1 Method of processing orifices. |
| 08/21/1991 | CN1053903A Cutting tool with twisted edge and manufacturing method thereof |
| 08/13/1991 | US5038642 Method of making drill with wear inserts |
| 08/13/1991 | US5038641 Drill with improved wear inserts |
| 08/07/1991 | CN1053575A Method of making selected size injection molding nozzle |
| 08/06/1991 | US5036579 Method for making a first object which can be fixed with great accuracy with respect to a second object |
| 07/31/1991 | EP0438739A1 Method of making a selected size injection molding nozzle |
| 07/31/1991 | CN1053382A Machine for cutting lateral fines on heat exchanger element of rectangular cross section |
| 07/31/1991 | CN1013398B Gear speed reducer and its production method |
| 07/26/1991 | WO1991011635A1 Double wrap friction band |
| 07/23/1991 | US5033938 Repaired turbine blade and method of repairing |
| 07/18/1991 | DE4100087A1 Mounting cam on cam shaft - involves pre-assembled cam and hollow cylinder |
| 07/17/1991 | EP0436996A1 Piston Rings |
| 07/17/1991 | CN1013229B Timepiece |
| 07/16/1991 | US5032243 Method and apparatus for forming or modifying cutting edges |
| 07/16/1991 | US5031484 Diamond fluted end mill |
| 07/16/1991 | US5031483 Process for the manufacture of laminated tooling |
| 07/09/1991 | US5029382 Variable pitch indexing pallet for heat exchanger assembly |
| 07/09/1991 | CA1285782C Cylindrical freezing drum for slice ice making machines and a method of producing the drum |
| 07/02/1991 | US5028153 Bearing block for robotic manipulator |
| 07/02/1991 | US5027777 Fuel injection rail manufacturing means and process and fuel injection rail made accordingly |
| 07/02/1991 | US5027763 One-piece push rod having enlarged spherical seat |
| 07/02/1991 | US5027509 Method for manufacturing a tool cylinder |
| 07/02/1991 | US5027496 Method of progressively making a model of multiple assemblies |
| 06/26/1991 | EP0434664A1 Stop ring groove manufacturing process |
| 06/25/1991 | US5026960 Chip breaker for polycrystalline CBN and diamond compacts |
| 06/25/1991 | US5025874 Cutting elements for rotary drill bits |
| 06/18/1991 | US5024977 Sintered compacts of silicon carbide, boron carbide, metal borides and free carbon |
| 06/18/1991 | US5024210 Water heater construction |
| 06/13/1991 | WO1991008080A1 Manufacturing process for diamond saw capable of high speed cutting |
| 06/12/1991 | EP0432090A2 Process for producing a coating and articles coated by the process |
| 06/12/1991 | EP0431681A2 Method and extrusion tool for making a blank with internal bores |
| 06/12/1991 | EP0431161A1 Machine tool for cutting out transverse ribs on a rectangular cross-section element for heat exchanger |
| 06/12/1991 | EP0431093A1 Poppet valve manufacture |
| 06/12/1991 | EP0431005A1 Apparatus and method for producing three-dimensional objects |
| 06/12/1991 | CN1012804B Milling cutter for variable-pitch band saw blade and making method thereof |
| 06/11/1991 | US5022814 Jump indexing pallet and method for heat exchanger assembly |
| 06/11/1991 | US5022801 CVD diamond coated twist drills |
| 06/11/1991 | US5022151 Method of making an aerosol nozzle assembly |
| 06/06/1991 | CA2020408A1 One-piece push rod having enlarged spherical seat |
| 06/05/1991 | EP0429900A2 Method for manufacturing hollow valves of piston motors |
| 06/05/1991 | EP0429553A1 Process for coating a metallic basic body with a non-conductive coating material. |
| 06/04/1991 | US5020394 Brazing |
| 05/29/1991 | EP0428772A1 Treatment of colic and teething |
| 05/29/1991 | EP0428759A1 Diamond-coated member |
| 05/29/1991 | CN2077773U Bainite steel cutter blade |
| 05/29/1991 | CN1051691A Chemically bonded superabrasives grit |
| 05/28/1991 | US5019114 Moulding tool and method of making same |
| 05/28/1991 | US5018274 Safety razor blade |
| 05/28/1991 | US5018273 Process for producing an orifice plate for pelletizing of plastics |
| 05/23/1991 | DE3938388A1 Mfg. U=shaped tube elbows for heat exchanger - forms solder venting ducts by milling cutters, with tube still straight |
| 05/22/1991 | EP0428491A2 Cutting insert of sintered hard alloy |
| 05/22/1991 | EP0428317A2 Method and apparatus for manufacturing an anchor bolt |
| 05/22/1991 | CN2077348U Winder for making aluminium fin on oval pipe |
| 05/21/1991 | US5016807 Method for producing workpieces of metal |
| 05/21/1991 | US5016498 Method and apparatus for manufacturing super abrasive cutting saw |
| 05/21/1991 | US5016340 Method of manufacture of a rotor core member for a dynamoelectric machine |
| 05/21/1991 | US5016337 Production method for net structures |
| 05/15/1991 | CN1051323A Method and apparatus for forming drum closure |
| 05/14/1991 | US5015265 Process for making cubic boron nitride from coated hexagonal boron nitride, and abrasive particles and articles made therefrom |
| 05/14/1991 | US5014411 Method of forming a locking nut and locked threaded connection |
| 05/08/1991 | EP0425812A2 Chip breaker for polycrystalline CBN and diamond compacts |
| 05/08/1991 | EP0425502A1 Process for machining radial through-slots in piston-ring grooves |
| 05/07/1991 | CA1283776C Method of making an internal wave generator for strain wave gearing |
| 05/02/1991 | EP0424953A2 Inner peripheral type thin plate blade: method of producing the same |
| 05/02/1991 | DE3934545A1 Heat storage unit or heat exchanger - is formed from coiled woven wire strip |
| 05/01/1991 | CA2023388A1 Chip breaker for polycrystalline cbn and diamond compacts |
| 04/30/1991 | US5011514 Hard particles with metal coating as matrix; high strength cutting tools |
| 04/30/1991 | CA1283601C Knife blade and method for making same |
| 04/24/1991 | EP0423500A2 Method of fabricating a flat condenser for a refrigeration machine, in particular for a household refrigerator, and the flat condenser thereof |
| 04/24/1991 | CN2075568U Special tool for machining flat connecting ring |
| 04/18/1991 | DE4003059C1 Stamping tool for cartons - has a stamper and a metal opposing plate, a dual-component reaction plastic carrier plate and a frame unit |
| 04/17/1991 | EP0422778A1 Improved method of brazing of diamond to substrate |
| 04/17/1991 | CN1050696A Technology for making strip-type hot tube vacuum pipe |
| 04/17/1991 | CA2027716A1 Process for the production of a plate condenser for a refrigerating machine, especially for a household refrigerator, as well as special plate condensers produced according to theproces |
| 04/16/1991 | US5007207 Abrasive product |
| 04/09/1991 | CA1282645C Method and apparatus for forming drum closure |
| 03/27/1991 | EP0418893A2 Method of machining a press die |
| 03/27/1991 | EP0418768A2 Stamping die and method of manufacture |
| 03/27/1991 | CN1012193B Row assemly for integral shroud blades |
| 03/20/1991 | CN1012061B Alumina coated silicon carbide whisker-alumina composition |
| 03/19/1991 | US4999952 Method and apparatus for manufacturing K-files and reamers |
| 03/07/1991 | WO1991002622A1 Cutting roller or punching cylinder and process for manufacturing |
| 03/05/1991 | US4996860 Method and apparatus for manufacturing anchor bolts for concrete |
| 02/27/1991 | EP0414410A2 Method for manufacturing a die for extruding honeycomb material |
| 02/27/1991 | EP0413983A1 Production method for a channeled wall thrust nozzle |
| 02/27/1991 | CN1049465A Tapered aperture stainless steel processing method |
| 02/26/1991 | US4995949 Orifice sizing using chemical, electrochemical, electrical discharge machining, plating, coating techniques |
| 02/26/1991 | US4995887 Cutting elements for rotary drill bits |
| 02/24/1991 | CA2012588A1 Method for manufacturing a die for extruding honeycomb material |
| 02/21/1991 | DE3927106A1 Schneidwalze oder stanzzylinder und verfahren zum herstellen von solchen Cutting roller or punching cylinder and process for the manufacture of such |
| 02/19/1991 | US4993150 Process for producing cup tappets for reciprocating-piston machines |
| 02/19/1991 | CA1280268C Injection molding nozzle having nose portion with heating element encircling the bore and method |
| 02/14/1991 | DE3926048A1 Method of producing embedded heat exchanger panels - has panel rolled from copper block with through holes followed by inflation with compressed air |
| 02/12/1991 | US4991697 Disc brake pad |
| 02/12/1991 | US4991481 Blade for cutting sheet material and related cutting method |