- Dikenal lewat
- Penulis
- Lahir
- 18 November 1937 (usia 88)
- Tempat lahir
- Los Angeles, California, USA
Len Janson
Biografi Len Janson belum ditambahkan.
Serial TV Len Janson
- 6.9
Sonic Underground
1999
Penulis
- 6.0
Dumb and Dumber
1995
Penulis
- 7.2
Sonic the Hedgehog
1993
Penulis
- 7.8
Tiny Toon Adventures
1990
Penulis
Little Wizards
1987
Kreator
- 7.7
The Real Ghostbusters
1986
Penulis
Going Bananas
1984
Penulis
- 6.3
Benji, Zax & the Alien Prince
1983
Penulis
- 6.0
The Biskitts
1983
Penulis
- 7.0
The Smurfs
1981
Penulis
- 6.2
The Love Boat
1977
Penulis
- 6.5
The Secrets of Isis
1975
Penulis
- 7.3
Groovie Goolies
1970
Penulis
Sumber: TMDB
Film Len Janson
Wacky and Packy
2004
Penulis
P.J. Funnybunny
1989
Penulis
- 5.7
Condor
1986
Penulis
- 7.3
My Smurfy Valentine
1983
Penulis
- 6.9
The Flintstones: Wind-Up Wilma
1981
Penulis
The Hanna-Barbera Hall of Fame: Yabba Dabba Doo II
1979
Penulis
The Haunted Heist
1974
Penulis
Daffy Duck and Porky Pig Meet the Groovie Goolies
1972
Penulis
Sergeant Swell of the Mounties
1972
Sutradara
Blaze Glory
1969
The Pug-Nosed Kid
- 7.0
Stop Look and Listen
1967
Sunglasses
Vicious Cycles
1967
Leader of the Vicious Cycles
Sumber: TMDB