Patent family with 5 members
engine
http://en.wikipedia.org/wiki/Fullerene
Combustion engine
Hollow molecule production
Sensor probe
Change the static electricity
printed-circuit cards
http://en.wikipedia.org/wiki/Printed_circuit_board
Patent family with 2 members
http://en.wikipedia.org/wiki/Fullerene; patent family with 3 members
Combustion engine; Patent family of 3 members
German utility model
German Utility Model
http://en.wikipedia.org/wiki/Adsorption; German utility model
