| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 5 | |
| #2 | Canada | 2 | |
| #3 | Germany | 2 | |
| #4 | Spain | 1 | |
| #5 | Finland | 1 | |
| #6 | United Kingdom | 1 | |
| #7 | Netherlands | 1 | |
| #8 | WIPO (World Intellectual Property Organization) | 1 |
| # | Industry | |
|---|---|---|
| #1 | Packaging and shipping | |
| #2 | Machines | |
| #3 | Electrical machinery and energy | |
| #4 | Medical technology | |
| #5 | Chemical engineering | |
| #6 | Environmental technology | |
| #7 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Transport or storage devices | |
| #2 | Physical therapy devices | |
| #3 | Separating solids | |
| #4 | Dynamo-electric machines | |
| #5 | Unspecified technologies | |
| #6 | Springs | |
| #7 | Reduction of greenhouse gas emissions | |
| #8 | Postal sorting |
| # | Name | Total Patents |
|---|---|---|
| #1 | Campbell David R | 7 |
| #2 | Randall Campbell David | 2 |
| #3 | Gabrys Christopher W | 1 |
| #4 | Campbell David Randall | 1 |
| #5 | Care Thomas | 1 |
| Publication | Filing date | Title |
|---|---|---|
| WO03021738A2 | Tubular flywheel energy storage system | |
| US3561907A | Apparatus and method for conveying and elevating substances | |
| US3595379A | Apparatus and method for conveying and elevating substances | |
| US3592556A | Conveyor with nub belt | |
| GB1076711A | Conveyor | |
| US3035696A | Produce grading machine | |
| US1164608A | Crutch and the like. | |
| CA892386A | Apparatus and method for conveying and elevating substances | |
| CA803837A | Conveyor |