Heilman; David R.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Heilman; David R..The latest application filed is for "adjustable coupling mechanism for a filter assembly for a retaining wall drainage tube".
- Heilman; David R. - Fenville MI
- Heilman; David R. - Fennville MI
- Heilman; David R. - Warren OH
| Patent | Date |
|---|---|
| Adjustable coupling mechanism for a filter assembly for a retaining wall drainage tube Grant 10,731,317 - Heilman , et al. | 2020-08-04 |
| Adjustable Coupling Mechanism For A Filter Assembly For A Retaining Wall Drainage Tube App 20190211525 - HEILMAN; David R. ; et al. | 2019-07-11 |
| Filter assembly for retaining wall drain holes Grant 10,124,281 - Heilman , et al. November 13, 2 | 2018-11-13 |
| Filter Assembly For Retaining Wall Drain Holes App 20180028950 - HEILMAN; David R. ; et al. | 2018-02-01 |
| Matable electrical connector means with inertia lock Grant 4,010,998 - Tolnar, Jr. , et al. March 8, 1 | 1977-03-08 |
| SEC | 0001417904 | Heilman David R |
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