Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6634214 | Method and apparatus for measuring the relative density of a gas | Robert Thurston, Barry Leonard Price | 2003-10-21 |
| 6474137 | Measuring relative density of a gas | Robert Thurston | 2002-11-05 |
| 6442996 | Method and apparatus for measuring the calorific value of a gas | Robert Thurston, Barry Leonard Price | 2002-09-03 |
| 6047589 | Apparatus for measuring a gas value | Geoffrey J. Parkinson, Robert Thurston | 2000-04-11 |
| 5635626 | Measurement of a gas characteristic | Robert Thurston | 1997-06-03 |
| 4756688 | Apparatus and method for the flow control of flue gas to combustion air in a regenerative heating system | Geoffrey J. Parkinson, David A. Churchill | 1988-07-12 |