Duc Doan

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Los Angeles, CA, US

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Patents Grantslast 30 patents

Information Patent Grant
Apparatus for monitoring traffic signals and alerting drivers
- Patent number 6,985,073
- Issue date Jan 10, 2006
- Duc Doan
- B60 - VEHICLES IN GENERAL
Information Patent Grant
Water supply system for multiple dwelling units
- Patent number 6,860,286
- Issue date Mar 1, 2005
- Duc T. Doan
- F17 - STORING OF DISTRIBUTING GASES OR LIQUIDS
Information Patent Grant
Mechanism for indicating when to change engine oil
- Patent number 5,322,033
- Issue date Jun 21, 1994
- Duc T. Doan
- G07 - CHECKING-DEVICES
Information Patent Grant
Telephone mounting stand
- Patent number 4,233,766
- Issue date Nov 18, 1980
- Duc Doan
- G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
Information Patent Grant
Solar powered street lighting system
- Patent number 4,200,904
- Issue date Apr 29, 1980
- Duc Doan
- G08 - SIGNALLING
Information Patent Grant
Vidicon reader
- Patent number 4,136,361
- Issue date Jan 23, 1979
- Duc Doan
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Visor optical camera system
- Patent number 4,100,557
- Issue date Jul 11, 1978
- Duc Doan
- A42 - HEADWEAR

Patents Applicationslast 30 patents

Information Patent Application
Hand wielded weapon
- Publication number 20080153602
- Publication date Jun 26, 2008
- Duc Doan
- A45 - HAND OR TRAVELLING ARTICLES
Information Patent Application
Extendable and retractable bumper protection apparatus
- Publication number 20070290515
- Publication date Dec 20, 2007
- Duc T. Doan
- B60 - VEHICLES IN GENERAL
Information Patent Application
Apparatus for monitoring and displaying vehicular operational status
- Publication number 20050280514
- Publication date Dec 22, 2005
- Duc Doan
- B60 - VEHICLES IN GENERAL
Information Patent Application
Water supply system for multiple dwelling units
- Publication number 20040069345
- Publication date Apr 15, 2004
- Duc T. Doan
- F17 - STORING OF DISTRIBUTING GASES OR LIQUIDS