B21
Mechanical metal-working without essentially removing material
Official title: Mechanical metal-working without essentially removing material; punching metal
B21 (Mechanical metal-working without essentially removing material) appears on 42,264 US grants and 30,664 published applications in this corpus.
Search patents in B21- Granted patents
- 42,264
- Published applications
- 30,664
- Assignees
- 12,668
- Inventors
- 65,198
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 827 | 0 |
| 1977 | 869 | 0 |
| 1978 | 791 | 0 |
| 1979 | 512 | 0 |
| 1980 | 620 | 0 |
| 1981 | 613 | 0 |
| 1982 | 545 | 0 |
| 1983 | 579 | 0 |
| 1984 | 668 | 0 |
| 1985 | 741 | 0 |
| 1986 | 761 | 0 |
| 1987 | 719 | 0 |
| 1988 | 690 | 0 |
| 1989 | 760 | 0 |
| 1990 | 708 | 0 |
| 1991 | 757 | 0 |
| 1992 | 694 | 0 |
| 1993 | 699 | 0 |
| 1994 | 707 | 0 |
| 1995 | 671 | 0 |
| 1996 | 721 | 0 |
| 1997 | 817 | 0 |
| 1998 | 926 | 0 |
| 1999 | 981 | 0 |
| 2000 | 908 | 0 |
| 2001 | 924 | 303 |
| 2002 | 856 | 865 |
| 2003 | 824 | 849 |
| 2004 | 745 | 1086 |
| 2005 | 618 | 976 |
| 2006 | 757 | 952 |
| 2007 | 599 | 914 |
| 2008 | 507 | 991 |
| 2009 | 483 | 1048 |
| 2010 | 593 | 1135 |
| 2011 | 673 | 1097 |
| 2012 | 809 | 1127 |
| 2013 | 859 | 1404 |
| 2014 | 895 | 1354 |
| 2015 | 1091 | 1678 |
| 2016 | 1147 | 1470 |
| 2017 | 1259 | 1529 |
| 2018 | 1115 | 1659 |
| 2019 | 1464 | 1634 |
| 2020 | 1372 | 1571 |
| 2021 | 1314 | 1443 |
| 2022 | 1260 | 1289 |
| 2023 | 1180 | 1252 |
| 2024 | 1073 | 1170 |
| 2025 | 964 | 1062 |
| 2026 | 599 | 806 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subclasses
Granted patents
- B21DWorking or processing of sheet metal or metal tubes, rods or profiles22,259
- B21BRolling of metal6,811
- B21CManufacture of metal sheets, wire, rods, tubes, profiles or like semi-manufactured products6,183
- B21JForging5,041
- B21KMaking forged or pressed metal products3,698
- B21FWorking or processing of metal wire2,614
- B21HMaking particular metal objects by rolling1,419
- B21LMaking metal chains419
All 9 subclassesShow fewer
Recent patents
- Manufacturing method for tinplate6 Oct 2026US 12,752,324 B2Institute of Research of Iron and Steel, Jiangsu Province/Sha-Steel, Co. Ltd (Cn)
- Forged steel roll for cold rolling6 Oct 2026US 12,752,325 B2Nippon Steel Corporation
- Temperature control system and temperature control method for hot rolling line6 Oct 2026US 12,752,326 B2TMEIC Corporation
- Thin-walled composite pipe with high thermal conductivity, and preparation method and application thereof6 Oct 2026US 12,752,327 B2Shaanxi Zinc Industry Co., Ltd.
- Flattening device6 Oct 2026US 12,752,328 B2Contemporary Amperex Technology (Hong Kong) Limited
- Cookware surface8 Oct 2026US 2026/0305867 A1Imperial Great British Design Limited
- Rolling mill stand with roll distance adjustment system8 Oct 2026US 2026/0307124 A1Danieli & C. Officine Meccaniche SpA
- Method and apparatus for determining rolling force in flat roller rolling process of corrugated composite plate8 Oct 2026US 2026/0307125 A1Taiyuan University of Technology
- Apparatus and method for receiving and unloading rolled bar8 Oct 2026US 2026/0307126 A1Danieli & C. Officine Meccaniche SpA
- Steel pipe out-of-roundness prediction method, steel pipe out-of-roundness control method, steel pipe manufacturing method, steel pipe out-of-roundness prediction model generation method, and steel pipe out-of-roundness prediction device8 Oct 2026US 2026/0307127 A1Jfe Steel Corporation
Most cited
By later US patents
- Surgical stapler anvil with nested staple forming pockets2,439US 6,953,138 B12005
- Intravascular radially expandable stent and method of implant1,694US 4,886,062 AMedtronic, Inc. · 1989
- Method of installing an insulating sleeve on a staple1,528US 3,940,844 APCI Group, Inc. · 1976
- Endovascular stent and delivery system1,483US 4,800,882 ACook Incorporated · 1989
- Method of forming a wire package1,477US 6,931,830 B22005