F03G
Spring, weight, inertia or like motors
Official title: SPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR (arrangements in connection with power supply in vehicles from force of nature B60K16/00; electric propulsion with power supply in vehicles from force of nature B60L8/00)
F03G (Spring, weight, inertia or like motors) appears on 5,494 US grants and 5,948 published applications in this corpus.
Search patents in F03G- Granted patents
- 5,494
- Published applications
- 5,948
- Assignees
- 2,260
- Inventors
- 9,858
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 78 | 0 |
| 1977 | 73 | 0 |
| 1978 | 88 | 0 |
| 1979 | 50 | 0 |
| 1980 | 82 | 0 |
| 1981 | 71 | 0 |
| 1982 | 72 | 0 |
| 1983 | 64 | 0 |
| 1984 | 64 | 0 |
| 1985 | 48 | 0 |
| 1986 | 37 | 0 |
| 1987 | 39 | 0 |
| 1988 | 53 | 0 |
| 1989 | 37 | 0 |
| 1990 | 39 | 0 |
| 1991 | 31 | 0 |
| 1992 | 26 | 0 |
| 1993 | 34 | 0 |
| 1994 | 27 | 0 |
| 1995 | 35 | 0 |
| 1996 | 27 | 0 |
| 1997 | 37 | 0 |
| 1998 | 29 | 0 |
| 1999 | 54 | 0 |
| 2000 | 51 | 0 |
| 2001 | 67 | 23 |
| 2002 | 55 | 60 |
| 2003 | 38 | 73 |
| 2004 | 68 | 104 |
| 2005 | 52 | 126 |
| 2006 | 64 | 134 |
| 2007 | 60 | 160 |
| 2008 | 66 | 171 |
| 2009 | 68 | 215 |
| 2010 | 115 | 244 |
| 2011 | 126 | 299 |
| 2012 | 131 | 254 |
| 2013 | 182 | 336 |
| 2014 | 220 | 344 |
| 2015 | 223 | 351 |
| 2016 | 213 | 273 |
| 2017 | 280 | 246 |
| 2018 | 249 | 237 |
| 2019 | 222 | 300 |
| 2020 | 211 | 280 |
| 2021 | 274 | 273 |
| 2022 | 234 | 302 |
| 2023 | 275 | 284 |
| 2024 | 265 | 374 |
| 2025 | 310 | 295 |
| 2026 | 180 | 190 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Main groups
Granted patents with any code in the group
- F03G 7/00Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise3,126
- F03G 6/00Devices for producing mechanical power from solar energy1,136
- F03G 4/00Devices for producing mechanical power from geothermal energy676
- F03G 3/00Spring, weight, inertia or like motors: other motors430
- F03G 1/00Spring motors317
- F03G 5/00Devices for producing mechanical power from muscle energy192
Recent patents
- Pumping device6 Oct 2026US 12,752,291 B2Tianzhou Medical (Suzhou) Co., Ltd
- Assembly for generating electricity in a production well of a hot fluid6 Oct 2026US 12,753,677 B2Affin AS
- Thermal energy storage system coupled with a solid oxide electrolysis system6 Oct 2026US 12,753,710 B2Rondo Energy, Inc.
- SMA actuator assembly6 Oct 2026US 12,753,742 B2Cambridge Mechatronics Limited
- Systems and methods for a remote control actuator6 Oct 2026US 12,753,743 B2Trustees of Tufts College
- Apparatus utilizing shape-memory and self-assembly to plug relatively wide remote fractures8 Oct 2026US 2026/0308440 A1The Penn State Research Foundation
- Methods of generating electric power and a distributed network of a generator-turbine apparatus having a set of electric generators simultaneously driven by a gravity-force applied and moment imbalanced turbine8 Oct 2026US 2026/0309131 A1
- Centrifugal force propulsion device8 Oct 2026US 2026/0309132 A1
- Systems and methods for drilling geothermal wells1 Oct 2026US 2026/0298032 A1Helmerich & Payne Technologies, LLC
- No funnel propless wind turbine and retrofit method1 Oct 2026US 2026/0298208 A1
Most cited
By later US patents
- Conducting polymer actuator1,732US 6,249,076 B1Massachusetts Institute of Technology · 2001
- Electronically activated capture device1,383US 7,063,671 B2Boston Scientific Scimed, Inc. · 2006
- Device and method employing shape memory alloy491US 6,916,159 B2TheraSense, Inc. · 2005
- Shape-memory alloy micro-actuator445US 5,061,914 ATiNi Alloy Company · 1991
- Apparatus for bending an insertion section of an endoscope using a shape memory alloy431US 4,930,494 AOlympus Optical Co., Ltd. · 1990