Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5229725 | Electrical fault detector in remote systems using a saturable core | William J. Spaeder | 1993-07-20 |
| 4325261 | Pulsed DC constant current magnetic flowmeter | William R. Freund, Jr., Paul Kenneth Kuhn | 1982-04-20 |
| 4309909 | Crystal stabilized voltage to frequency converter with digital calibration for flowmeters | William R. Freund, Jr. | 1982-01-12 |
| 4306461 | Meter incorporating a digital fullscale setting device | — | 1981-12-22 |
| 4287773 | Bidirectional magnetic flowmeter | William R. Freund, Jr. | 1981-09-08 |
| 4287774 | Magnetic flowmeter with ultrasonically cleaned electrodes | William R. Freund, Jr. | 1981-09-08 |
| 4283958 | Magnetic flowmeter having automatic ranging | William R. Freund, Jr. | 1981-08-18 |
| 4262543 | Magnetic flowmeter having multiple stage amplifier with automatic zeroing | William R. Freund, Jr. | 1981-04-21 |
| 4262542 | Family of magnetic flowmeters | William R. Freund, Jr. | 1981-04-21 |