David Hagopian

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Irvine, CA, US

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Patents Grantslast 30 patents

Information Patent Grant
Ear-fitting headphone attachment apparatus
- Patent number 12,047,729
- Issue date Jul 23, 2024
- D SQUARED VENTURES
- Harry Duane Romo
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Ear-fitting headphone attachment apparatus
- Patent number 11,641,540
- Issue date May 2, 2023
- D SQUARED VENTURES
- Harry Duane Romo
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Travel pillow apparatus, storage apparatus for the travel pillow ap...
- Patent number 11,478,093
- Issue date Oct 25, 2022
- D SQUARED VENTURES
- Harry Duane Romo
- A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...

Patents Applicationslast 30 patents

Information Patent Application
EAR-FITTING HEADPHONE ATTACHMENT APPARATUS, AND METHODS OF MANUFACT...
- Publication number 20230421944
- Publication date Dec 28, 2023
- D Squared Ventures
- Harry Duane Romo
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
TRAVEL PILLOW SYSTEM
- Publication number 20230136528
- Publication date May 4, 2023
- D Squared Ventures
- Harry Duane Romo
- A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...
Information Patent Application
EAR-FITTING HEADPHONE ATTACHMENT APPARATUS, AND METHODS OF MANUFACT...
- Publication number 20210105551
- Publication date Apr 8, 2021
- D Squared Ventures
- Harry Duane Romo
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
TRAVEL PILLOW APPARATUS, STORAGE APPARATUS FOR THE TRAVEL PILLOW AP...
- Publication number 20210030174
- Publication date Feb 4, 2021
- D Squared Ventures
- Harry Duane Romo
- A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...