Spoormaker; Arie W.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Spoormaker; Arie W..The latest application filed is for "wall fired duct heater".
- Spoormaker; Arie W. - Maassluis NL
| Patent | Date |
|---|---|
| Wall fired duct heater Grant 4,375,952 - Vosper , et al. * March 8, 1 | 1983-03-08 |
| Wall fired duct heater Grant 4,286,945 - Vosper , et al. September 1, 1 | 1981-09-01 |
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