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40 Inventive Principles
Combining

a) Combine homogeneous objects or objects designed for contiguous operation.

b) Combine in time homogeneous or contiguous operations.
 

EXAMPLE:
  1. Twin microscope. The adjusting is performed by one person, a second person can simultaneously observe and record.
  2. Tandem bicycle. The drive sprockets of both cyclists are synchronized by a common chain.
  3. The bucket of an excavator is additionally equipped with steam nozzles to soften the ground whilst digging. Details