The Patents of Boban Stojanovic

The blog is designed for the purpose of publication of author’s patents and applications.

1989. I entered electrical engineering faculty in Belgrade .

1991. I left for Germany because of the war in former Yugoslavia.

1992. I came back from Germany and suffered from depression .
Due to illness, I failed to graduate from university although I had been an excellent student.

2004. As an undergraduate engineer of electronics author started in the field of research since up until then the circumstances in Serbia had been such not to allow any kind of creative work. Because of the accident, in the country, which technologically lags behind, a couple of practical ideas emerged in the author. After weeks of work, he submitted a patent application for automatic toilet. The automatic toilet worked on the principle of filtration of sound and it automatically flushed after usage. After some time he gave up the idea of the patent, because the solutions with IC reflecting sensors appeared to be more practical.

link to: http://capacitive-sensor.blogspot.com/

link to http://boban-toys.blogspot.com/

Afterwards, the author patented semi conductive arrestor. The patent was designed for automatic arrestors as an additional element, which would give 5V to the plug box or the light bulb switch if no consumer around. In case of the consumer, that says if the capacity is more than 1mA, two thyrstors make a short circuit and give 220V to the plug box. If the electric current is more than 3A, an additional relay bridge the trhystors so there is no drop voltage of 0,7V in them. The appliance would cost about 2 dollars and it would eliminate parasite capacities of the home installation. There would not be any radiation of cables or it would be symbolical for 50Hz. The essence of the appliance is in its safety, which would be very high in hot water boilers and booster pumps as higher safety of home installation. The author received a gold medal for this patent at the Tesla Fest in Novi Sad. After a few months and many contacts, the author found out about similar patent in Germany.

Although the function difference was obvious there also existed some kind of a legal chance to cover the part of the market, which had not been covered by the Germans, but he gave up the idea.

Early in 2005, due to the lack of ideas and with a need to create, the author started his work on children’s contact free musical potties. Forasmuch as the idea was soon practically realized, the device needed some improvement. The device used about 15 micro A with a supply of 3V. Besides, it was necessary that the device in discreet technique would cost about 0, 3-0, 7 dollars. The device was thought to be a self-adhesive box. It was clear that with the small price of the device he could displace the old technology of manufacturing of musical potties because the costs of the montage which depended on manpower in Western Europe cost about 0,3 -0,7 dollars.

The appliance of the sensor in children’s toys and dolls was more than obvious intention of some manufacturers to exploit the patent by the legal maneuvers without any kind of redress.
Early in 2008 author submits a number of patent applications for capacitive sensor with one electrode. The essence of the patent was that there was only one electrode variable sensor capacitor and the other electrode was the rest of the circuit.

The device detected capacitance cities lower than 0, 1 pF. That means it could detect a conductor, electrolyte, or hand at 1-2 cm distance. The device is relatively simply constructed and it would find its appliance in self-disconnecting flat iron, wireless computer mouse and many other devices. There are seven patent applications for this device submitted at the Intellectual Property Office of Serbia and four PCT applications. The device uses about 3 micro A. In wireless computer mouse, the device

would decrease battery consumption in standby regime and would extend duration of batteries at least for 50 %. The use of the device in mobile phones is more than obvious. The device is also possible to realize as a sensor matrix, therefore the detection of the finger would be possible, and as a quite practical usage, it could appear in remote controls and keyboards in which case there will not be need for contact or a chance for the devices to break. It happened to all of us that a button on a remote control would not work. By using the capacitive sensor in a keyboard or a remote control, breakdowns would be impossible. Self-disconnecting flat iron is only one of the examples for use of capacitive sensor for hand detection. The iron should turn off in about 1,5 minutes but in the movie it is set to few seconds for demonstration. The iron is not active when not held in hand. A complete electronics for self-disconnecting iron costs about 2 dollars. The dimensions of PCB are around 2x4 cm. For patents Stand up sensor and Horizontal capacitive sensor the author received the second gold medal in 2008 in Novi Sad.

P-04396YU (19.07.2006), WIPO-PCT/RS2007/000013(28.05.2007) No:-WO/2008/010739 )
P-2008/00063 (14.02 2008),P-2008/0097(04.03 2008), P-2008/98 (04.03 2008),P-2008/104 (07.03 2008),P-2008/469 (09.10. 2008) ,P-2008/495 (23.10.2008) ,P-2008/496 (23.10.2008) ,