John Y. Ma

Person

Glenview, IL, US

People

Patents Grantslast 30 patents

Information Patent Grant
Up-down frequency converter for cable T.V.
- Patent number 4,352,209
- Issue date Sep 28, 1982
- John Ma
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Television receiver automatic frequency control system
- Patent number 4,015,075
- Issue date Mar 29, 1977
- Zenith Radio Corporation
- John Y. Ma
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Television receiver with tuner capable of receiving air and CATV si...
- Patent number 4,002,986
- Issue date Jan 11, 1977
- Zenith Radio Corporation
- John Y. Ma
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Signal overload protection circuit for varactor tuner
- Patent number 3,983,490
- Issue date Sep 28, 1976
- Zenith Radio Corporation
- John Y. Ma
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Non-proportionate AFC system
- Patent number 3,980,968
- Issue date Sep 14, 1976
- Zenith Radio Corporation
- John Y. Ma
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Television tuning system with precision substrate switch assembly
- Patent number 3,965,427
- Issue date Jun 22, 1976
- Zenith Radio Corporation
- John Y. Ma
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Abrupt junction varactor diode television tuner
- Patent number 3,962,643
- Issue date Jun 8, 1976
- Zenith Radio Corporation
- John Y. Ma
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
All electronic digital tuner system with memory
- Patent number 3,946,319
- Issue date Mar 23, 1976
- Zenith Radio Corporation
- John Ma
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Digital signal seeking tuning system
- Patent number 3,931,579
- Issue date Jan 6, 1976
- Zenith Radio Corporation
- John Ma
- H03 - BASIC ELECTRONIC CIRCUITRY

Person

Patents Grantslast 30 patents

Up-down frequency converter for cable T.V.

Television receiver automatic frequency control system

Television receiver with tuner capable of receiving air and CATV si...

Signal overload protection circuit for varactor tuner

Non-proportionate AFC system

Television tuning system with precision substrate switch assembly

Abrupt junction varactor diode television tuner

All electronic digital tuner system with memory

Digital signal seeking tuning system