| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 6 | |
| #2 | Australia | 5 | |
| #3 | WIPO (World Intellectual Property Organization) | 4 |
| # | Industry | |
|---|---|---|
| #1 | Thermal processes | |
| #2 | Consumer goods | |
| #3 | Engines, pumps and turbines |
| # | Technology | |
|---|---|---|
| #1 | Refrigerators | |
| #2 | Ice-boxes | |
| #3 | Pumps |
| # | Name | Total Patents |
|---|---|---|
| #1 | Longsworth Ralph C | 12 |
| #2 | Gao Jin Lin | 6 |
| #3 | Xu Mingyao | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US2006174635A1 | Multi-stage pulse tube with matched temperature profiles | |
| AU2003217905A1 | Fast warm up pulse tube | |
| AU2003214808A1 | Cryopump with two-stage pulse tube refrigerator | |
| AU2003207463A8 | Pulse tube cooling by circulation of buffer gas | |
| US7165406B2 | Integral pulse tube refrigerator and cryopump | |
| US6629418B1 | Two-stage inter-phasing pulse tube refrigerators with and without shared buffer volumes | |
| US6488120B1 | Fail-safe oil lubricated helium compressor unit with oil-free gas delivery |