<Tr> <Th> Production company (s) </Th> <Td> <Ul> <Li> Miller - Milkis (1974--81) </Li> <Li> Henderson (1978--84) </Li> <Li> Miller - Milkis - Boyett (1981--84) </Li> </Ul> </Td> </Tr> <Ul> <Li> Miller - Milkis (1974--81) </Li> <Li> Henderson (1978--84) </Li> <Li> Miller - Milkis - Boyett (1981--84) </Li> </Ul> <Li> Miller - Milkis (1974--81) </Li> <Li> Henderson (1978--84) </Li>

Where was the tv show happy days filmed