John Hegarty

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Gillette, NJ, US

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Patents Grantslast 30 patents

Information Patent Grant
Waveguide-containing communications and sensing systems
- Patent number 4,820,016
- Issue date Apr 11, 1989
- American Telephone and Telegraph Company, AT&T Bell Laboratories
- Leonard G. Cohen
- G02 - OPTICS
Information Patent Grant
Optical systems with antireciprocal polarization rotators
- Patent number 4,762,384
- Issue date Aug 9, 1988
- American Telephone and Telegraph Company, AT&T Bell Laboratories
- John Hegarty
- G02 - OPTICS
Information Patent Grant
Optical systems with antireciprocal polarization rotators
- Patent number 4,671,621
- Issue date Jun 9, 1987
- American Telephone and Telegraph Company, AT&T Bell Laboratories
- Joseph F. Dillon
- G02 - OPTICS