Rosebank (Mr.)

Husband of Mrs. Rosebank.
World-famous inventor and ice cream maker.
Builder of the legendary Ice Cream machine (ICM).
Has a dedicated inventor’s shed on school premises, which is OUT OF BOUNDS.
If a kid is caught near the shed, he or she will be expelled immediately.

Things Mr. Rosebank has invented or been involved with inventing:

Anti-invisibility Goggles
Concrete Tape
Flus
Conveyor belts at The Sniffsonian
Invisibility Shields
KB-15
Nose on the Noncycle
P’tonk-45
Zap-flattener