Every week, the Money team answers a reader's financial problem or consumer dispute - you can email yours to moneyblog@sky.uk. Today's is... I have a Grundig washer/dryer, which I've owned from new.

For much of the nineteenth century, inventors submitted a model with their patent application to the United States Patent Office. The National Museum of American History’s patent model collection ...

Dimensional tolerances are critical for making parts that will fit together in an assembly and meet the design and performance goals. Getting the tolerances wrong could easily mean parts will be too ...

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