Dance training device
Dancing teaching device
Data processing for fill-in-the-blanks question with a...
Data processing form
Data projection system
Data transmission system having self-testing capabilities
Decision support and work management for synchronizing...
Decorating kit and methods
Demonstration device for refrigeration system
Demonstration device modelling a living organism
Demonstration devices for medical procedures
Demonstration of magnetic phenomena
Demonstrative apparatus having air-cushioned movable disks
Demonstrative methods for paper towel products
Demonstrative methods for toilet tissue products
Demountable device for building electrical machines
Dental typodont for practicing the art of dentistry
Design of machine controls using pilot equipment
Detachable ski or terrain map
Determining developmental progress for preschool children