| 9919390 | Combined ring rolling method for spherical valve body | Sep 18, 15 | Mar 20, 18 | WUHAN UNIVERSITY OF TECHNOLOGY |
| 9789523 | Multi-roll table ring-rolling mill as well as method for rolling rings in a multi-roll table ring-rolling mill | Apr 07, 15 | Oct 17, 17 | SMS GROUP GMBH |
| 9719369 | Manufacturing method for material for ring rolling | Mar 18, 14 | Aug 01, 17 | HITACHI METALS, LTD. |
| 9592547 | Method of manufacturing annular molding | Dec 10, 12 | Mar 14, 17 | MITSUBISHI MATERIALS CORPORATION |
| 6644151 | Apparatus for the continuous, chipless separation of individual, identical disk-shaped blanks or rods from round bar-shaped workpieces | Feb 21, 01 | Nov 11, 03 | Mannesmann AG |
| 6536314 | Device for continuous chipless separation of single identical rings from tubular workpieces | Sep 05, 00 | Mar 25, 03 | Mannesmann AG |
| 5882123 | Roll-formed bearing race and process for producing the same | Jun 03, 97 | Mar 16, 99 | MPB CORPORATION |
| 5868050 | Process and device for the continuous, chipless separation of individual rings from tubular workpieces | Dec 17, 96 | Feb 09, 99 | VOAFONE AKTIENGESELLSCHAFT |
| 5829291 | Apparatus and process for forming metal member including bases portion and cylindrical portion formed on outer surface of the base portion such that the cylindrical portion is integral with the base portion | May 16, 97 | Nov 03, 98 | KOJIMA PRESS INDUSTRY CO., LTD. |
| 5605068 | Apparatus for rolling a ring-shaped work | May 18, 95 | Feb 25, 97 | Daido Tokushuko Kabushiki Kaisha |
| 5467627 | End finisher machine | Jan 05, 94 | Nov 21, 95 | Wauseon Machine and Manufacturing, Inc. |
| 5465598 | Method for forming an annular member | Oct 27, 94 | Nov 14, 95 | TOPY KOGYO KABUSHIKI KAISHA, Ishihara; Shunso, |
| 5419028 | Method of making a hose coupling | Apr 04, 94 | May 30, 95 | PARKER INTANGIBLES, LLC |
| 5412967 | Method of making a metallic ring-shaped body | Aug 10, 94 | May 09, 95 | ISHIKAWAJIMA-HARIMA HEAVY INDUSTRIES CO., LTD. |
| 5339668 | Hose coupling, ferrule therefor and methods of making the same | Oct 27, 93 | Aug 23, 94 | PARKER INTANGIBLES, LLC |
| 5241748 | Method for manufacturing a compression ring | Jun 22, 92 | Sep 07, 93 | Teikoku Piston Ring Co., Ltd. |
| 5115655 | Integrally stiffened rings | Feb 01, 91 | May 26, 92 | GENERAL ELECTRIC CAPITAL CORPORATION |
| 4823580 | Wheel-body forming apparatus | Oct 22, 87 | Apr 25, 89 | Not available |
| 4634038 | Apparatus for the manufacture of ring members | Jun 06, 85 | Jan 06, 87 | Not available |
| 4612789 | Making rings from tube or bar stock | Jul 30, 84 | Sep 23, 86 | FORMFLO LIMITED, FORMFO LIMITED LANSDOWN INDUSTRIAL ESTATE,, |