Boersma; Rintje
Patent Applications and Registrations
Patent applications and USPTO patent grants for Boersma; Rintje.The latest application filed is for "circuit-breakers for high voltages".
- Boersma; Rintje - Harmelen NL
| Patent | Date |
|---|---|
| Circuit-breakers for high voltages Grant 4,109,124 - Boersma , et al. August 22, 1 | 1978-08-22 |
| Metal clad switch gear for high voltages Grant 3,886,336 - Boersma , et al. May 27, 1 | 1975-05-27 |
| Metal Clad Isolator Switches For High Tension And Double Interruption Grant 3,665,135 - Boersma , et al. May 23, 1 | 1972-05-23 |
| Sf System With Constant Density And Constant Pressure Differential Maintaining Means For A High-voltage Switchgear Grant 3,614,355 - Boersma October 19, 1 | 1971-10-19 |
| Isolator Switches Provided With Grounding Switch Blades And Ground Responsive Signalling And Protective Means Grant 3,599,041 - Boersma , et al. August 10, 1 | 1971-08-10 |
| Electric Current Contact Grant 3,571,547 - Boersma , et al. March 23, 1 | 1971-03-23 |
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