| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 7 | |
| #2 | EPO (European Patent Office) | 3 | |
| #3 | Canada | 2 | |
| #4 | India | 1 | |
| #5 | WIPO (World Intellectual Property Organization) | 1 | |
| #6 | South Africa | 1 |
| # | Industry | |
|---|---|---|
| #1 | Engines, pumps and turbines | |
| #2 | Machines | |
| #3 | Thermal processes | |
| #4 | Consumer goods |
| # | Technology | |
|---|---|---|
| #1 | Pumps | |
| #2 | Ice-boxes | |
| #3 | Refrigerators | |
| #4 | Unspecified technologies | |
| #5 | Unspecified technologies | |
| #6 | Air-conditioning |
| # | Name | Total Patents |
|---|---|---|
| #1 | Gilbertson Thomas A | 12 |
| #2 | Gilbertson Thomas Arthur | 3 |
| Publication | Filing date | Title |
|---|---|---|
| ZA8406541B | Pressurized,ice-storing chilled water system | |
| US4490097A | Hydraulic pump driving unit for oil wells | |
| US4492536A | Hydraulic oil well pumping unit | |
| US4432706A | Oil well pump driving unit | |
| US4446703A | Air conditioning system and method | |
| US4480685A | Oil well pump driving unit | |
| EP0051665A1 | Oil well pump driving unit | |
| US4320799A | Oil well pump driving unit |