Do you agree with the April 28, 2009 date?
No, since 20 years from application would give us a later expiration date.
These are the expiration dates as I understand them....
The spread spectrum patent, 4,901,307, was issued on Feb. 13, 1990. Application date was October 17, 1986.
Expiration Feb 13th 2007
The power control patent, 5,056,109, was issued on October 8, 1991. Application date was Nov. 7, 1989.
Expiration Nov 7th 2009
The soft handoff patent, 5,101,501, was issued on March 31, 1992. Application date was Nov. 7, 1989.
Expiration Nov 7th 2009
The wave form patent, 5,103,459, was issued on April 7, 1992. Application date was June 25, 1990.
Expiration June 25th 2010
The rake receiver patent, 5,109,390, was issued on April 28, 1992. Application date was Nov. 7, 1989.
Expiration Nov 7th 2009 |
