These projects are not realized, but are proved in practice by small models

These projects are not realized, but are proved in practice by small models. It takes time and financial resources to develop these projects. I have not come across an information that similar products or even just ideas exist in the world.
For that reason I do not intend to explain in detail the functioning of the ideas that have all the elements to become patents. I shall only approximately say what it is about.

*THE NEW TYPE OF SMALL LOUDSPEAKERS OF EXTREMELY GREAT POWER

*THE PRINTER FOR EXTREMELY LARGE FORMATS (the printer itself is small)

*THE MINIATURE MOBILE CAMERA FOR SHOOTING IN LARGE AREAS (suitable for stadiums, covers an area of 100m x 50m x 20m)

*THE ELECTRONIC GENERATOR OF IMPULSE PRESSURE at the moment, applicable with air rifles, as a substitute for powder in special effects for movies…)

Not mentioned here are many ideas of mine which I have not proven in practice yet, and that is why I have not mentioned them. I have put only the ones I consider more interesting and PROVEN IN PRACTICE WITH SMALLER MODELS.