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Rosenman & Colin LLP was a New York City-based law firm that practiced from 1912 to 2002, at which point the firm merged with Chicago-based Katten Muchin Zavis to form Katten Muchin Rosenman. The firm previously practiced under the name Rosenman, Colin, Freund, Lewis & Cohen.
Rosenman & Colin numbered some 275 attorneys when it merged with Katten Muchin Zavis in 2002, with offices in New York, Washington, DC, and Charlotte, North Carolina. Rosenman & Colin was well known for its estate and trust planning and administration, real estate, intellectual property and litigation practices. These practice areas have been influential in all aspects of New York City's legal arenas over the years.
- Marc Stuart Dreier – former New York litigator and convicted Ponzi scheme swindler
- Clive Davis – music mogul
- Michel Rosenfeld – professor at Benjamin N. Cardozo School of Law
- Charles J. O'Byrne – Secretary to the Governor of the State of New York
- Maria Echaveste – Senior adviser to President Bill Clinton
- David G. Greenfield – NYC Councilman
- Samuel I. Rosenman – Founder
- William Golub – lawyer and advisor to Nelson Rockefeller
- David Dunlap, 'Lawyers who mold the shape of a city,' New York Times, February 25, 1996.