A61M 5/315
Pistons
Official title: Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod {or piston}; Appliances on the rod for facilitating dosing {; Dosing mechanisms}
A61M5/315 (Pistons) appears on 6,871 US grants and 8,874 published applications in this corpus.
Search patents in A61M- Granted patents
- 6,871
- Published applications
- 8,874
- Assignees
- 1,871
- Inventors
- 9,245
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 13 | 0 |
| 1977 | 17 | 0 |
| 1978 | 12 | 0 |
| 1979 | 8 | 0 |
| 1980 | 17 | 0 |
| 1981 | 12 | 0 |
| 1982 | 14 | 0 |
| 1983 | 14 | 0 |
| 1984 | 15 | 0 |
| 1985 | 11 | 0 |
| 1986 | 22 | 0 |
| 1987 | 33 | 0 |
| 1988 | 15 | 0 |
| 1989 | 26 | 0 |
| 1990 | 25 | 0 |
| 1991 | 31 | 0 |
| 1992 | 29 | 0 |
| 1993 | 41 | 0 |
| 1994 | 70 | 0 |
| 1995 | 58 | 0 |
| 1996 | 53 | 0 |
| 1997 | 61 | 0 |
| 1998 | 74 | 0 |
| 1999 | 74 | 0 |
| 2000 | 73 | 0 |
| 2001 | 70 | 36 |
| 2002 | 60 | 79 |
| 2003 | 91 | 89 |
| 2004 | 58 | 148 |
| 2005 | 41 | 117 |
| 2006 | 60 | 110 |
| 2007 | 37 | 204 |
| 2008 | 46 | 203 |
| 2009 | 56 | 221 |
| 2010 | 129 | 224 |
| 2011 | 147 | 237 |
| 2012 | 136 | 358 |
| 2013 | 203 | 395 |
| 2014 | 245 | 395 |
| 2015 | 280 | 432 |
| 2016 | 331 | 551 |
| 2017 | 391 | 486 |
| 2018 | 367 | 519 |
| 2019 | 526 | 530 |
| 2020 | 457 | 578 |
| 2021 | 424 | 601 |
| 2022 | 425 | 498 |
| 2023 | 399 | 557 |
| 2024 | 389 | 553 |
| 2025 | 404 | 450 |
| 2026 | 281 | 303 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- A61M 5/31565Administration mechanisms, i.e. constructional features, modes of administering a dose3,363
- A61M 5/31511Piston or piston-rod constructions2,853
- A61M 5/31533Dosing mechanisms, i.e. setting a dose2,291
- A61M 5/31501Means for blocking or restricting the movement of the rod or piston1,197
- A61M 5/31525Dosing1,014
- A61M 5/31596Comprising means for injection of two or more media580
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- Medication delivery device with needle carrier8 Oct 2026US 2026/0306746 A1Eli Lilly and Company
- Medicament delivery system with dose divider8 Oct 2026US 2026/0306747 A1Sanofi Pasteur Limited
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- Liquid delivery cap with alignment verification8 Oct 2026US 2026/0306749 A1Patients Pending Ltd.
Most cited
By later US patents
- Interchangeable tools for surgical instruments2,056US 8,758,391 B2Ethicon Endo-Surgery, Inc. · 2014
- Medication delivery device with a microprocessor and characteristic monitor1,907US 5,925,021 AVisionary Medical Products, Inc. · 1999
- Networked system for interactive communications and remote monitoring of drug delivery1,346US 6,270,455 B1Health Hero Network, Inc. · 2001
- Integrated delivery device for continuous glucose sensor1,246US 7,591,801 B2DexCom, Inc. · 2009
- Coupling for injection devices1,183US 8,574,199 B2Novo Nordisk A/S · 2013