Stamp: X-ray tube, letter "X" as X-ray image (Finland 1995)
X-ray tube, letter "X" as X-ray image (Finland 1995)
08 August (Finland ) within release 100th Anniversary of the Discovery of X-rays goes into circulation Stamp X-ray tube, letter "X" as X-ray image face value 4.30 Finnish markka
| Stamp X-ray tube, letter "X" as X-ray image in catalogues | |
|---|---|
| Michel: | Mi:FI 1309 |
Stamp is square format.
Stamp X-ray tube, letter "X" as X-ray image it reflects the thematic directions:
An invention is a unique or novel device, method, composition, idea, or process. An invention may be an improvement upon a machine, product, or process for increasing efficiency or lowering cost. It may also be an entirely new concept. If an idea is unique enough either as a stand-alone invention or as a significant improvement over the work of others, it can be patented. A patent, if granted, gives the inventor a proprietary interest in the patent over a specific period of time, which can be licensed for financial gain.
