improvement patent

Improvement patents either remove or add something to an existing invention to make it better.

These were published as "additional improvement patents" and were given numbers preceded by "A.I.".

During this period, Johnson and Bye filed for and received several new firearms features and firearms feature improvement patents.

Most of the original patents for the Linotype had expired and so the basic works of the Intertype were essentially the same, though incorporating at least 51 improvement patents.

In 1978, Richard W. Peters of Industrial Research Products (IRP) was granted an improvement patent entitled "Priority mixer control".

Hones borrowed the prototype from Harrigan, analyzed its physics with help of his father, who worked at Los Alamos National Laboratory, then filed an "improvement patent" of his own.

In Regina Glass Fibre v Schuller [1972]RPC 229 it was held that the licensee had the right to continue using improvement patents and know-how even after the end of the licence agreement.