Hach; Clifford C.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Hach; Clifford C..The latest application filed is for "programmable chemical application system".
- Hach; Clifford C. - Loveland CO
- Hach; Clifford C. - Ames IA
| Patent | Date |
|---|---|
| Programmable chemical application system Grant 4,993,634 - Hach , et al. * February 19, 1 | 1991-02-19 |
| Programmable fertilizer application system Grant 4,878,614 - Hach , et al. November 7, 1 | 1989-11-07 |
| System and method for quantitative analysis of a solution Grant 4,865,992 - Hach , et al. September 12, 1 | 1989-09-12 |
| Continuous pH meter Grant 4,288,308 - Hach September 8, 1 | 1981-09-08 |
| Mechanical strainer Grant 4,177,148 - Hach , et al. December 4, 1 | 1979-12-04 |
| Digital titration device Grant 4,086,062 - Hach April 25, 1 | 1978-04-25 |
| Method and apparatus for sampling impure water Grant 4,053,282 - Hach , et al. October 11, 1 | 1977-10-11 |
| Method and apparatus for automatically analyzing fluids Grant 3,953,136 - Hach April 27, 1 | 1976-04-27 |
| Disposable weight burette and method for carrying out titrimetric analyses Grant 3,905,768 - Hach September 16, 1 | 1975-09-16 |
| Method And Apparatus For Eliminating Air During Fluid Turbidity Measurement Grant 3,849,002 - Hach November 19, 1 | 1974-11-19 |
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