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Class Information
Number: 219/121.72
Name: Electric heating > Metal heating (e.g., resistance heating) > By arc > Using laser > Cutting > Methods
Description: Subject matter including the process of severing a workpiece.

Patents under this class:
1 2 3 4 5 6 7 8 9 10 11 12

Patent Number Title Of Patent Date Issued
5984159 Method and apparatus for cutting through a flat workpiece made of brittle material, especially glass Nov. 16, 1999
5983676 Laser fiber chopper Nov. 16, 1999
5968382 Laser cleavage cutting method and system Oct. 19, 1999
5940957 Laser process for making a filter for an ink jet Aug. 24, 1999
5942138 Process of producing laminar structure by bonding of sheet metal blanks after preliminary bonding Aug. 24, 1999
5922224 Laser separation of semiconductor elements formed in a wafer of semiconductor material Jul. 13, 1999
5916460 Method and apparatus for dicing a substrate Jun. 29, 1999
5910260 Laser cutter and method for cutting sheet material Jun. 8, 1999
5902499 Method and apparatus for machining material with a liquid-guided laser beam May. 11, 1999
5889253 Laser beam machining apparatus and method which employs a laser beam to pretreat and machine a workpiece Mar. 30, 1999
5886319 Automatic operations on materials Mar. 23, 1999
5886320 Laser ablation with transmission matching for promoting energy coupling to a film stack Mar. 23, 1999
5878464 Apparatus and method for converting continuous tow fibers into a staple length Mar. 9, 1999
5859405 Cutting tool precision turning method and apparatus for a heat-treatable steel workpiece Jan. 12, 1999
5852276 Laser machining resuming method Dec. 22, 1998
5851335 Method and compositions for laser imprinting AND articles imprinted using such methods and compositions Dec. 22, 1998
5847358 Method and apparatus for removing material from metal workpieces moved relative to a laser removal tool Dec. 8, 1998
5847359 Laser beam machining system and method with restart command function Dec. 8, 1998
5808274 Method of cutting masking sheet to be used to process silicon wafer Sep. 15, 1998
5780805 Pattern shifting laser cutter Jul. 14, 1998
5777294 Laser beam machining system and method using preliminary work commands Jul. 7, 1998
5770833 Laser cutting method including piercing a work piece with a moving processing head Jun. 23, 1998
5767479 Laser beam machining apparatus and corresponding method which employs a laser beam to pretreat and machine a workpiece Jun. 16, 1998
5763853 Laser processing apparatus, laser processing method and dam bar processing method Jun. 9, 1998
5759428 Method of laser cutting a metal line on an MR head Jun. 2, 1998
5760368 Laser beam method using an inactive gas as the assist gas Jun. 2, 1998
5747770 Method of energy beam forming surgical incision members May. 5, 1998
5741456 Carbon fibre panels with laser formed holes Apr. 21, 1998
5734146 High pressure oxygen assisted laser cutting method Mar. 31, 1998
5719375 Stiffener manufacturing method and apparatus thereof Feb. 17, 1998
5705788 Process for treatment of materials with diode radiation Jan. 6, 1998
5705708 Inhibition of discoloration of cumene hydroperoxide Jan. 6, 1998
5688418 Method and apparatus for laser cutting Nov. 18, 1997
5683600 Gas turbine engine component with compound cooling holes and method for making the same Nov. 4, 1997
5670069 Laser processing method Sep. 23, 1997
5662821 Method and device for producing a screen printing stencil Sep. 2, 1997
5662822 Dam bar cutting apparatus and dam bar cutting method Sep. 2, 1997
5651904 Method for removing material from metal workpieces moved relative to the removal tool Jul. 29, 1997
5637169 Method of building three dimensional objects with sheets Jun. 10, 1997
5626777 Process for producing dividable plates of brittle material with high accuracy and apparatus for receiving and precision-grinding the end faces of a plate May. 6, 1997
5611949 Method and apparatus for laser cutting separate items carried on a continuously moving web Mar. 18, 1997
5609284 Method of splitting non-metallic materials Mar. 11, 1997
5585018 Laser cutting method eliminating defects in regions where cutting conditions are changed Dec. 17, 1996
5585017 Defocused laser drilling process for forming a support member of a fabric forming device Dec. 17, 1996
5585015 Laser machining apparatus and method Dec. 17, 1996
5582749 Laser beam machine and laser beam machining method Dec. 10, 1996
5578228 Process for the laser beam cutting of strip or plate workpieces, especially magnetic steel sheets Nov. 26, 1996
5578229 Method and apparatus for cutting boards using opposing convergent laser beams Nov. 26, 1996
5569399 Lasing medium surface modification Oct. 29, 1996
5565120 Method of supplying laser cutting gas and cutting apparatus implementing such a method Oct. 15, 1996

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