Timothy Belcher Dyk (born February 14, 1937) is an American lawyer and jurist serving since 2000 as a U.S. circuit judge of the U.S. Court of Appeals for the Federal Circuit.

Career output and lasting influence
Opinions attributed per year · peak 31/year
Later decisions citing those opinions, per year · peak 685/year
Federal Circuit Clerk/Executive · 2000–Federal Circuit Court of Appeals · 2000–
Both charts share the same year axis. Opinion counts include only opinions in our corpus attributed to this judge so far — a year at zero can mean an attribution gap, not judicial silence. Influence typically outlasts the career: citations keep climbing after the last opinion.
- Gender
- Male
- Race
- White
Prior employment
- Private practice, Washington, D.C.1964–2000
Lecturer · 1983, 1986, 1989- Yale Law SchoolLecturer · 1986–1987, 1989
Visiting professor and lecturer · 1984–1985, 1987–1988
Tax Division, U.S. Department of JusticeSpecial assistant to the assistant attorney general · 1963–1964
Law clerk , Hon. Earl Warren · 1962–1963
Law clerk , Hon. Stanley Reed and Hon. Harold Burton · 1961–1962
Appointments
2000–present · Appointed by William J. Clinton (Democratic)- 2000–present
Education
J.D. · 1961- Harvard CollegeA.B. · 1958