Calhoun; L. Owen
Patent Applications and Registrations
Patent applications and USPTO patent grants for Calhoun; L. Owen.The latest application filed is for "trenchduct construction having adjustable lid-supporting means".
- Calhoun; L. Owen - Richmond Hill CA
| Patent | Date |
|---|---|
| Trenchduct construction having adjustable lid-supporting means Grant 4,404,779 - Calhoun , et al. September 20, 1 | 1983-09-20 |
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