|
Telecom facts:
International rates
and revenues
Interstate minutes
Interstate costs
Telecom revenues
Telephone CPI 1
Telephone CPI 2
Area codes
Local loops
Employees
Wireless
Patents
Toll free numbers
Toll free revenue
High speed 1
High speed 2
High speed 3
SMS traffic
SMS revenue |
Telecommunications
Patents
Note: 1996 total reflects one-time change
in law affecting patents.
Source: U.S. Patent and Trademark Office,
Patent Counts by Class by Year, January 1977 - December 2003,
Telecommunications Classes 370, 375, 379 and 455,
(March 2004).
|