| Patents for B23B 51 - Tools for drilling machines (12,490) |
|---|
| 01/09/1991 | EP0406283A1 Twist drill |
| 01/08/1991 | US4983079 Twist drill |
| 01/08/1991 | CA2020134A1 Device for cutting undercuts |
| 01/08/1991 | CA1278710C Hard-metal twist drill with internal cooling channels |
| 01/02/1991 | EP0404883A1 Drilling/chamfering tool. |
| 12/18/1990 | US4978258 For forming an undercut in a borehole |
| 12/12/1990 | CN2067199U Cut-off tool for solid test specimen |
| 12/12/1990 | CN2067198U Drilling tool for thin plate |
| 12/11/1990 | US4976325 Fluted cutting tool and method of producing same |
| 12/11/1990 | CA1277516C Drill having two or more cutting edges comprising exchangeable cutting members |
| 12/04/1990 | US4975003 Drill |
| 12/04/1990 | US4975002 Boring tool for coarse and fine machining |
| 11/29/1990 | WO1990014189A1 High-speed burnishing drill |
| 11/20/1990 | US4971486 Undercutting drill |
| 11/20/1990 | US4971485 Cemented carbide drill |
| 11/20/1990 | US4971483 Cutter plate for precision working, especially of holes |
| 11/13/1990 | USRE33440 Annular cutter |
| 11/12/1990 | EP0406283A4 Twist drill. |
| 11/06/1990 | US4968193 Self-centering drill bit with pilot tip |
| 11/06/1990 | US4968192 Rotary cutting |
| 11/06/1990 | US4968189 Hole saw driver-extruder and hole enlarger |
| 10/31/1990 | EP0395335A1 Bit for drilling an undercut hole |
| 10/31/1990 | EP0394444A1 Twist drill for making deep holes |
| 10/30/1990 | US4966503 Drill bit for drilling a hole in layered material of different hardness |
| 10/30/1990 | US4966502 Hollow drilling tool |
| 10/25/1990 | DE3911995A1 Tool bit for precision chamfering of holes - has varying clearance angle giving high and consistent accuracy of chamfer |
| 10/24/1990 | EP0394188A1 Milling tool |
| 10/24/1990 | CN2064276U Twist drill with three cutting edges |
| 10/23/1990 | US4964765 Chamfering machine |
| 10/23/1990 | US4964476 Drilling device for producing drill holes with an undercut |
| 10/23/1990 | US4964475 Drilling device for producing drill holes with undercut |
| 10/18/1990 | WO1990012193A1 Coupling for drilling machine with dust extractor |
| 10/17/1990 | EP0392730A2 A cutting insert for a milling cutting tool |
| 10/17/1990 | EP0392729A2 A cutting insert for a milling cutting tool |
| 10/17/1990 | CN2063850U Porous bit |
| 10/16/1990 | US4962820 Device for producing drill holes having an undercut |
| 10/16/1990 | CA1275188C Drill screw |
| 10/11/1990 | DE3911159A1 Coupling for drill pipe with force transmission |
| 10/10/1990 | EP0391695A1 Cutters |
| 10/10/1990 | EP0391683A1 Drilling |
| 10/10/1990 | CN2063455U Mechanical clamping unregrinding twist drill |
| 10/09/1990 | US4961674 Drill guide for precise drilling |
| 10/09/1990 | US4961672 Drill and cutting insert therefor |
| 10/04/1990 | DE3910427A1 Cutting tool |
| 10/04/1990 | DE3910426A1 Tool for reverse counterboring and facing |
| 10/03/1990 | EP0389788A2 Combination to make circular undercuttings with a continuously variable diameter in the full material |
| 09/27/1990 | DE3909643A1 Cutting-edge arrangement for tools cutting with a circular movement |
| 09/27/1990 | DE3909481A1 Drilling tool |
| 09/27/1990 | DE3909077A1 Combination for producing circular recesses of infinitely variable diameter in solid material |
| 09/26/1990 | CN2062664U Screwing tool for through-hole |
| 09/26/1990 | CN2062663U Drill with anti-slip cylindrical handle |
| 09/11/1990 | US4955764 Boring tool cooled from within made of a tool spiral and a clamping cylinder |
| 09/07/1990 | WO1990010090A1 Nitrogen-containing cermet |
| 09/05/1990 | EP0385059A2 Drill |
| 09/05/1990 | CN1045055A 钻头 Drill |
| 09/05/1990 | CN1045050A Stepped twist drill bit |
| 09/05/1990 | CN1009469B Borehole drill construction |
| 09/04/1990 | US4954024 Precision boring tool |
| 08/30/1990 | DE3906036A1 Drill for making drilled holes with an undercut |
| 08/29/1990 | CN2061101U Multifunctional drilling tool |
| 08/28/1990 | US4952102 Annular hole cutter |
| 08/28/1990 | US4951690 Method of drilling through a bone structure |
| 08/23/1990 | DE3905016A1 Drill for making drill holes in masonry |
| 08/23/1990 | DE3904822A1 Multi-edge countersinking, drilling or boring tool |
| 08/21/1990 | US4950111 Drill bit with spurs and having rectangular center spur with concave tip |
| 08/21/1990 | US4950108 Drill comprising drill body and replaceable drill tip |
| 08/16/1990 | EP0382678A2 Drilling device for undercutting |
| 08/15/1990 | CN2060379U Non-coupling bar slotting drill bit |
| 08/14/1990 | US4948306 Drill |
| 08/08/1990 | CN2060095U Strong cutting double worm screw |
| 08/07/1990 | US4945792 Boring tool for machining the interior of narrow neck casing |
| 08/01/1990 | EP0380096A1 Cemented carbide drill |
| 07/31/1990 | US4944640 Vertical feed type burnishing drill |
| 07/25/1990 | WO1990008614A1 Drill |
| 07/25/1990 | EP0378964A2 Trepanning tool |
| 07/25/1990 | CN1044060A Device for supply of cooland to cutting tools |
| 07/24/1990 | US4943192 Drill bit having a shank with grooves |
| 07/19/1990 | DE3901075A1 Method and arrangement for producing a bore with an undercut |
| 07/18/1990 | CN2059381U Internal cooled compound drill fixed by mechanical fixture |
| 07/17/1990 | US4941783 Drilling device |
| 07/12/1990 | DE3909024C1 Boring implement for making holes in service lines |
| 07/11/1990 | CN2059113U Adjustable clamping tool central hole combined drill |
| 07/04/1990 | CN2058870U Mechanical clamping drill |
| 06/27/1990 | EP0375526A1 Precision trepanning tool for panels of sandwiched materials |
| 06/26/1990 | US4936721 Drill reamer bit |
| 06/21/1990 | DE3842401A1 Adapter which can be combined with the tool spindle of a hand-guided electric tool |
| 06/20/1990 | EP0373292A1 Boring tool for metal workpieces, plastics and the like |
| 06/20/1990 | CN1043101A A chamfering tool with a cutting knife |
| 06/13/1990 | EP0373111A2 Device for treating a bone, especially a jaw bone and/or a tooth |
| 06/13/1990 | EP0302915A4 Combined hole making and threading tool. |
| 06/13/1990 | DE3841284A1 Drilling device for making drilled holes with undercut |
| 06/12/1990 | US4932815 Boring or reaming tool |
| 06/05/1990 | US4930585 Device for drilling borehole undercuts |
| 05/31/1990 | DE3840082A1 Device for making undercuts in drill holes |
| 05/31/1990 | DE3840066A1 Drilling device for making undercut drill holes |
| 05/30/1990 | EP0370295A1 Method and device for producing a cylindrical body |
| 05/30/1990 | EP0370210A2 Deburring tool with cutting blades |
| 05/30/1990 | EP0370204A1 Drilling device for producing a drilled hole with a recess |
| 05/29/1990 | US4929127 Drill bit for producing drilled holes with an undercut |
| 05/23/1990 | EP0276310B1 Diamond drill for working hard brittle materials |