Alexander C. Chang

Follow

Person

Palm Springs, CA, US

People

Patents Grantslast 30 patents

Information Patent Grant
Oxygen masks
- Patent number 11,679,218
- Issue date Jun 20, 2023
- Alexander C. Chang
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information Patent Grant
Oxygen masks
- Patent number 10,646,675
- Issue date May 12, 2020
- Alexander C. Chang
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE

Patents Applicationslast 30 patents

Information Patent Application
OXYGEN MASKS
- Publication number 20230347087
- Publication date Nov 2, 2023
- Alexander C. CHANG
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information Patent Application
OXYGEN MASKS
- Publication number 20230256185
- Publication date Aug 17, 2023
- Alexander C. CHANG
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information Patent Application
OXYGEN MASKS
- Publication number 20200261678
- Publication date Aug 20, 2020
- Alexander C. CHANG
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information Patent Application
OXYGEN MASKS
- Publication number 20190038863
- Publication date Feb 7, 2019
- Alexander C. CHANG
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information Patent Application
OXYGEN MASKS
- Publication number 20160030695
- Publication date Feb 4, 2016
- Alexander C. Chang
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information Patent Application
Egg monitoring methods and apparatus
- Publication number 20070142722
- Publication date Jun 21, 2007
- Alexander C. Chang
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information Patent Application
Remote electrocardiogram for early detection of coronary heart disease
- Publication number 20050043640
- Publication date Feb 24, 2005
- Alexander C. Chang
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE