Keith E. Boonstra

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Holland, MI, US

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Patents Grantslast 30 patents

Information Patent Grant
Humidifier with removable locator module
- Patent number 11,959,661
- Issue date Apr 16, 2024
- Nova Humidity LLC
- Keith Erwin Boonstra
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Grant
Humidifier utilizing filtered water
- Patent number 10,871,297
- Issue date Dec 22, 2020
- Keith Erwin Boonstra
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Grant
Humidifier utilizing filtered water
- Patent number 9,885,487
- Issue date Feb 6, 2018
- Keith Erwin Boonstra
- C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
Information Patent Grant
Humidifier utilizing filtered water
- Patent number 8,991,794
- Issue date Mar 31, 2015
- Keith E. Boonstra
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Grant
Method of reducing downward flow of air currents on the lee side of...
- Patent number 8,978,683
- Issue date Mar 17, 2015
- Zeeland Wood Turning Works, Inc.
- Keith Erwin Boonstra
- F17 - STORING OF DISTRIBUTING GASES OR LIQUIDS

Patents Applicationslast 30 patents

Information Patent Application
HUMIDIFIER UTILIZING FILTERED WATER
- Publication number 20180156479
- Publication date Jun 7, 2018
- KEITH ERWIN BOONSTRA
- F24 - HEATING RANGES VENTILATING
Information Patent Application
HUMIDIFIER UTILIZING FILTERED WATER
- Publication number 20150176849
- Publication date Jun 25, 2015
- KEITH ERWIN BOONSTRA
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Application
Humidifier Utilizing Filtered Water
- Publication number 20150090662
- Publication date Apr 2, 2015
- Keith E. Boonstra
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL