Matthew T. Wirkkala

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Boxford, MA, US

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Patents Grantslast 30 patents

Information Patent Grant
Hydrant grinding arrangement
- Patent number 7,871,312
- Issue date Jan 18, 2011
- Matthew T. Wirkkala
- B24 - GRINDING POLISHING

Patents Applicationslast 30 patents

Information Patent Application
Hydrant grinding arrangement
- Publication number 20090106965
- Publication date Apr 30, 2009
- Matthew T. Wirkkala
- A62 - LIFE-SAVING FIRE-FIGHTING