Volgstadt; Frank R.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Volgstadt; Frank R..The latest application filed is for "valve and tapping tee apparatus and method".
- Volgstadt; Frank R. - Madison OH
| Patent | Date |
|---|---|
| Valve and tapping tee apparatus and method Grant 4,809,735 - Volgstadt , et al. * March 7, 1 | 1989-03-07 |
| Valve and tapping tee apparatus and method Grant 4,730,636 - Volgstadt , et al. March 15, 1 | 1988-03-15 |
| No-hole insertion joint Grant 4,487,432 - Passerell , et al. December 11, 1 | 1984-12-11 |
| Gas riser apparatus Grant 4,482,170 - Jacobson , et al. November 13, 1 | 1984-11-13 |
| Stab-type coupling and method Grant 4,282,175 - Volgstadt , et al. August 4, 1 | 1981-08-04 |
| Stab-type coupling Grant 4,229,025 - Volgstadt , et al. October 21, 1 | 1980-10-21 |
| Pipe fitting having a non-metallic sealing member Grant 4,083,583 - Volgstadt , et al. April 11, 1 | 1978-04-11 |
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