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Sample Inventors (first name only)

Across
Invented the sychronous multiplex railway telegraph
Name of person that invented Automatic Air Brake
Person invented early spark plug
They invented street sweeper truck
Invented a method of fabricating an imaging X-ray spectrometer
Folding bed
Co-developed the foil electric microphone
Down
Invented refrigerated truck systems
Invented Amputee self-feed device
Wooden clock
Patent for the hot comb
Steam table
Invented a version of the automatic lubricator for steam engines