Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5493086 | Monitoring and regulating device for a fluid such as engine oil | Eric Miller, David Nunneley, Charles R. Lawrence | 1996-02-20 |
| 5355733 | Wide scale pointer arc, diaphragm gauge | Lewis M. Carlton | 1994-10-18 |
| 5231508 | Hall effect gauge with magnetically-sensitive variable-resistance element | — | 1993-07-27 |
| 5121109 | Adjustable set point signalling gauge | James R. Francisco, Troy Teague | 1992-06-09 |
| 5040420 | Pressure responsive sending unit | Lewis M. Carlton, Oren D. Moffett | 1991-08-20 |
| 4975687 | Hall effect signalling gauge | James R. Francisco, Charles R. Lawrence, Troy Teague | 1990-12-04 |
| 4505288 | Pneumatically controlled dump valve system for gas scrubbers | Lewis M. Carlton, Bob L. O'Mary, Teddy H. Cruse | 1985-03-19 |