B21D
Working or processing of sheet metal or metal tubes, rods or profiles
Official title: Working or processing of sheet metal or metal tubes, rods or profiles without essentially removing material; punching metal (working or processing of wire b21f)
B21D (Working or processing of sheet metal or metal tubes, rods or profiles) appears on 22,259 US grants and 16,726 published applications in this corpus.
Search patents in B21D- Granted patents
- 22,259
- Published applications
- 16,726
- Assignees
- 7,561
- Inventors
- 34,339
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 431 | 0 |
| 1977 | 418 | 0 |
| 1978 | 375 | 0 |
| 1979 | 255 | 0 |
| 1980 | 295 | 0 |
| 1981 | 293 | 0 |
| 1982 | 274 | 0 |
| 1983 | 269 | 0 |
| 1984 | 342 | 0 |
| 1985 | 392 | 0 |
| 1986 | 408 | 0 |
| 1987 | 369 | 0 |
| 1988 | 378 | 0 |
| 1989 | 395 | 0 |
| 1990 | 351 | 0 |
| 1991 | 408 | 0 |
| 1992 | 379 | 0 |
| 1993 | 385 | 0 |
| 1994 | 374 | 0 |
| 1995 | 318 | 0 |
| 1996 | 327 | 0 |
| 1997 | 387 | 0 |
| 1998 | 469 | 0 |
| 1999 | 479 | 0 |
| 2000 | 400 | 0 |
| 2001 | 436 | 142 |
| 2002 | 416 | 401 |
| 2003 | 415 | 413 |
| 2004 | 380 | 544 |
| 2005 | 304 | 483 |
| 2006 | 411 | 492 |
| 2007 | 308 | 447 |
| 2008 | 265 | 531 |
| 2009 | 256 | 523 |
| 2010 | 308 | 595 |
| 2011 | 334 | 563 |
| 2012 | 400 | 602 |
| 2013 | 469 | 773 |
| 2014 | 488 | 762 |
| 2015 | 601 | 952 |
| 2016 | 661 | 810 |
| 2017 | 715 | 880 |
| 2018 | 629 | 920 |
| 2019 | 846 | 964 |
| 2020 | 757 | 904 |
| 2021 | 776 | 814 |
| 2022 | 737 | 752 |
| 2023 | 675 | 733 |
| 2024 | 659 | 660 |
| 2025 | 546 | 628 |
| 2026 | 296 | 438 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Main groups
Granted patents with any code in the group
- B21D 53/00Making other particular articles4,437
- B21D 22/00Shaping without cutting, by stamping, spinning, or deep-drawing3,313
- B21D 39/00Application of procedures in order to connect objects or parts2,895
- B21D 51/00Making hollow objects2,478
- B21D 28/00Shaping by press-cutting2,182
- B21D 5/00Bending sheet metal along straight lines2,158
- B21D 43/00Feeding, positioning or storing devices combined with, or arranged in, or specially1,973
- B21D 37/00Tools as parts of machines covered by this subclass1,753
All 29 main groupsShow fewer
- B21D 26/00Shaping without cutting otherwise than using rigid devices or tools or yieldable1,500
- B21D 7/00Bending rods, profiles, or tubes1,184
- B21D 1/00Straightening, restoring form or removing local distortions of sheet metal or specific925
- B21D 11/00Bending not restricted to forms of material mentioned in only one of894
- B21D 35/00Combined processes according to or processes combined with methods covered by groups751
- B21D 19/00Flanging or other edge treatment698
- B21D 41/00Application of procedures in order to alter the diameter of tube ends612
- B21D 24/00Special deep-drawing arrangements in, or in connection with, presses579
- B21D 13/00Corrugating sheet metal, rods or profiles502
- B21D 31/00Working or processing of sheet metal or metal tubes, rods or profiles479
- B21D 47/00Making rigid structural elements or units447
- B21D 3/00Straightening or restoring form of metal rods, metal tubes, metal profiles, or427
- B21D 17/00Forming single grooves in sheet metal or tubular or hollow articles414
- B21D 45/00Ejecting or stripping-off devices arranged in machines or tools dealt with in371
- B21D 15/00Corrugating tubes274
- B21D 9/00Bending tubes using mandrels or the like264
- B21D 55/00Safety devices protecting the machine or the operator, specially adapted for apparatus155
- B21D 25/00Working sheet metal of limited length by stretching147
- B21D 21/00Combined processes according to methods covered by groups b21d1/00 - b21d19/0054
- B21D 49/00Sheathing or stiffening objects43
- B21D 33/00Special measures in connection with working metal foils28
Recent patents
- Flattening device6 Oct 2026US 12,752,328 B2Contemporary Amperex Technology (Hong Kong) Limited
- Method of fabricating metal mask6 Oct 2026US 12,752,329 B2Darwin Precisions Corporation
- Foil stamping die for manufacturing vehicle interior component6 Oct 2026US 12,752,330 B2Moriroku Kabushiki Kaisha
- Workpiece transfer method, workpiece transfer device, and workpiece transfer program6 Oct 2026US 12,752,331 B2Kawasaki Jukogyo Kabushiki Kaisha
- Method and forming device for producing ring-shaped formed parts6 Oct 2026US 12,752,332 B2Hatebur Umformmaschinen AG
- 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
- Systems, methods, and devices for automated bending of fixation plates8 Oct 2026US 2026/0307129 A1Ohio State Innovation Foundation
- Coin Cell Case8 Oct 2026US 2026/0307130 A1Wildcat Discovery Technologies, Inc.
- Manufacturing method for a metallic part and associated metallic part8 Oct 2026US 2026/0307131 A1
- Electrode shearing apparatus8 Oct 2026US 2026/0307132 A1Samsung SDI.Co., Ltd.
Most cited
By later US patents
- Surgical stapler anvil with nested staple forming pockets2,439US 6,953,138 B12005
- Method of installing an insulating sleeve on a staple1,528US 3,940,844 APCI Group, Inc. · 1976
- Medical staple forming die and punch1,336US 5,381,649 A1995
- Method for forming a staple1,254US 10,130,359 B2Ethicon, Inc. · 2018
- Metal-forming die and method for manufacturing same1,085US 7,086,267 B22006