Donald Fraser van Royen

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New York, NY, US

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Patents Grantslast 30 patents

Information Patent Grant
Holding chamber for face mask
- Patent number D692122
- Issue date Oct 22, 2013
- Koninklijke Philips N.V.
- Dirk Ernest von Hollen
- D24 - Medical and laboratory equipment
Information Patent Grant
Face mask
- Patent number D679376
- Issue date Apr 2, 2013
- Koninklijke Philips Electronics N.V.
- Dirk Ernest von Hollen
- D24 - Medical and laboratory equipment
Information Patent Grant
Face mask
- Patent number D679377
- Issue date Apr 2, 2013
- Koninklijke Philips Electronics N.V.
- Dirk Ernest von Hollen
- D24 - Medical and laboratory equipment
Information Patent Grant
Face mask
- Patent number D679378
- Issue date Apr 2, 2013
- Koninklijke Philips Electronics N.V.
- Dirk Ernest von Hollen
- D24 - Medical and laboratory equipment