Matthew David Day

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Oakland, CA, US

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Patents Grantslast 30 patents

Information Patent Grant
Electroencephalogram signal amplification device
- Patent number D973885
- Issue date Dec 27, 2022
- X Development LLC
- Gabriella Levine
- D24 - Medical and laboratory equipment
Information Patent Grant
Electronic signal amplification device
- Patent number D955346
- Issue date Jun 21, 2022
- X Development LLC
- Gabriella Levine
- D13 - Equipment for production, distribution, or transformation of energy
Information Patent Grant
Electroencephalogram signal amplification device
- Patent number D919818
- Issue date May 18, 2021
- X Development LLC
- Gabriella Levine
- D24 - Medical and laboratory equipment
Information Patent Grant
Fabric head covering
- Patent number D912257
- Issue date Mar 2, 2021
- X Development LLC
- Matthew David Day
- D24 - Medical and laboratory equipment
Information Patent Grant
Disposable head covering
- Patent number D889078
- Issue date Jul 7, 2020
- X Development LLC
- Matthew David Day
- D02 - Apparel and haberdashery