The Sky+ app, which was given an improved design this year, is also a great television guide in its own right.

In the mid 19th century the Vienna valve was an improved design.

In 1900, an improved design featuring primarily a shorter barrel was introduced as the M1900.

Propellers of improved design were also fitted at this time.

These ran to 9 vessels, but their indifferent performance led to calls for an improved design.

For army tests early in 1939 an improved design with lengthened barrel was presented.

Their theoretical description is important not only from a fundamental point of view, but also in order to generate new and improved designs.

How could one help someone who failed to appreciate an improved design?

The second prototype, developed in 2007, was an improved design using four valves.

This lead in 1954 to a much improved design that was capable to circumvent the earth for a year!