David Ladd
U.S. Commissioner of Patents
In office 1961–1963
Preceded by	Robert C. Watson
Succeeded by	Edward J. Brenner
10th Register of Copyrights
In office June 2, 1980 – January 2, 1985
Preceded by	Barbara Ringer
Succeeded by	Donald Curran
Personal details
Born	(1926-09-18)September 18, 1926 Portsmouth, Ohio
Died	October 12, 1994(1994-10-12) (aged 68) Arlington, Virginia
Nationality	American
Spouse	Ann Weaver
Alma mater	University of Chicago (J.D. and B.A.)
Military service
Branch/service	U.S. Army
Years of service	1945–1946

David Lowell Ladd (September 18, 1926 – October 12, 1994) was a former Commissioner of Patents and Register of Copyrights in the United States, the first (and currently only) individual to serve in both offices.

Ladd was born in Portsmouth, Ohio and attended the University of Chicago, where he received a bachelor of arts degree and, later, a degree in law.^[1] In 1961, Ladd was appointed to lead the U.S. Patent Office by President John F. Kennedy. At age 35, he was the second youngest man to ever hold the position.^[2]

As Commissioner of Patents, Ladd led a comprehensive reorganization of the Office and was present during the Office's 125th anniversary and granting of patent number 3,000,000.^[2]

In 1980, Ladd succeeded Barbara Ringer as U.S. Register of Copyrights. Like Ringer, Ladd was seen as a strong advocate for authors' rights, and he adopted the position that the Copyright Office should play an active role in favor of copyright protection in public policy discussions.^[3]

Ladd was succeeded by Donald Curran in 1985 and returned to private practice at Wiley, Rein & Fielding.^[1] He retired in 1987 and died in his home in Alexandria, Virginia in 1994, survived by his wife.^[2]