Research/Patents/US 6225963
US 6225963

CLOVERLEAF SPIRAL ANTENNA AND ARRAY

Assignee

MCDONNELL DOUGLAS CORPORATION A CORP OF MD

Filed

Dec 11, 1981

Granted

May 1, 2001

Location

FERGUSON MO US

35 USC §181 Secrecy Order

Imposed

Jun 23, 1982

Rescinded

Mar 15, 2000

Duration

17 years, 9 months

Inventor

  • 1FREDERICK W. VORTMEIER

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Back to patent indexSource: USPTO 35 USC §181 secrecy order records