Darrell L. Helms

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Tucson, AZ, US

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Patents Grantslast 30 patents

Information Patent Grant
Integrated stacked patch antenna polarizer circularly polarized int...
- Patent number 5,815,119
- Issue date Sep 29, 1998
- E-Systems, Inc.
- Darrell L. Helms
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Low profile antenna array for land-based, mobile radio frequency co...
- Patent number 5,757,324
- Issue date May 26, 1998
- E-Systems, Inc.
- Darrell L. Helms
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Meanderline polarization twister
- Patent number 4,786,914
- Issue date Nov 22, 1988
- E-Systems, Inc.
- Te-Kao Wu
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
180 degree dipole phase shifter
- Patent number 4,587,525
- Issue date May 6, 1986
- E-Systems, Inc.
- Kenneth M. Parsons
- H01 - BASIC ELECTRIC ELEMENTS