Company overview. CMT Partners (also recorded in FCC and network-registry filings as "CMT Partnership" and d/b/a Cellular One of San Francisco) was a U.S. wireless carrier serving the San Francisco Bay Area and San Jose. Its registered address was 651 Gateway Blvd., Suite 1500, South San Francisco, CA 94080 (ARIN; FCC ASR application). The business traces to a 1986 partnership between PacTel Cellular (later AirTouch) and McCaw Cellular Communications (later AT&T Wireless Services); in 1993, after the parents bought out Associated Communications, the San Francisco/San Jose, Dallas, and Kansas City properties were combined into a 50/50, 99-year joint venture named CMT Partners (RCR Wireless News, 1996; New York Times, 1993; LA Times, 1991). RCR reported roughly 800 employees in 1996. In 2000, AT&T Wireless agreed to buy Vodafone AirTouch's 47% stake in Cellular One of San Francisco as part of a $3.3 billion three-market deal, converting the brand to AT&T Wireless (SFGate/AP, 2000). Public sources do not give current standalone revenue, headcount, or a parent; as a distinct carrier brand the entity effectively ended around 2000–2001, after which the business folded into AT&T Wireless and, later, Cingular/AT&T Mobility.
Products / services. CMT Partner's operations consisted of retail cellular (mobile voice) service under the Cellular One brand in the Bay Area, network operations, and wholesale interstate cellular exchange access — it filed FCC Tariff F.C.C. No. 2 in 1994, which MCI unsuccessfully moved to reject (FCC DA-94-238). This is an operating carrier, not a patent-assertion entity.
Patent-litigation posture. The tracked data show one appearance: 0 as plaintiff, 1 as defendant. That profile is consistent with an operating company being sued rather than an NPE asserting a portfolio. The single case sits in the U.S. District Court for the District of Massachusetts — not a plaintiff-friendly patent venue such as the Eastern District of Texas.
Notable case. Freedom Wireless, Inc. v. Boston Communications Group, Inc. et al. (D. Mass., No. C-00-1129-SBA), filed 2000 by a privately held Phoenix patent holder against BCGI and carriers Cingular Wireless, AT&T Wireless, CMT Partners, and Western Wireless. A May 20, 2005 jury verdict awarded $128 million, with BCGI found liable for the full amount and the carriers liable for smaller, time-based amounts. The judge upheld the verdict in September 2005; the dispute was ultimately resolved in a 2006 settlement of about $87 million, including roughly $32 million due from the carrier co-defendants (Mass Lawyers Weekly; Law.com; Reuters). CMT's individual liability was not separately disclosed.