Patenting System - a Historic Perspective
News items flooding from our daily information sources on patents, company law suits, intellectual property rights, and the like would make one believe that the system of patenting is quite young. On the contrary, history of patenting dates back to more than five hundred years.
The present day patent concept was first implemented in England in 1449. King Henry VI of England granted a 20 year monopoly to one, John Utynam, on his stained glass manufacturing process. Though, stained glass manufacturing process was prevalent then, in various parts of England, it was the first state-granted limited monopoly for an industrial practice. By 1552, open letters called Letters Patent were issued under the Great Seal of the King, to officers and friends patronized by the Court. These Letters Patent were issued not only on inventions but on industries, too. For example, the stationers enjoyed a privileged monopoly over publishing industry in England. In 1624, the English Parliament under the directions of Sir Francis Bacon, a great thinker of those times, adopted the doctrine of public interest into patenting. It passed the Statute of Monopolies, recognizing the economic benefits through innovation and awarded patents to protect the rights of the inventors for a term of 14 years.
Immigrants from England in search of new shores of opportunity, traveled to the New World that was already discovered by Christopher Columbus. In 1585, authorized with a patent from Queen Elizabeth to claim and colonize the "heathen and barbarous lands", Sir Walter Raleigh, established the first British colony in North America. Along with the colonizers came the patenting system from England to America. The patenting system was followed provincially within the various British colonies.
In due course of time, the need to protect the interests of the inventors was constitutionally recognized and included in the US constitution as the Intellectual Property Clause. Over the next fifty years, after the US constitution was framed, the US Congress passed the Patent Acts of 1790, 1793, and 1836. These Patent Acts formed the basis for the first legally regulated patenting system. The Patent Act of 1790 was drafted by Thomas Jefferson, the principal author of the Declaration of Independence. The 14 years exclusivity of rights over an invention was retained in this Act, and it was required to submit s along with the applications. Under the 1790 Act patents were issued only to physical inventions that were put into practice and not on ideas.
The patent application examination extended over several months and the granting happened over even longer durations. Between 1790 and 1793 only 57 patents were issued owing to inefficiency at the level of processing patent applications. As a response to the mounting pressure from the inventors the Patent Act of 1793 was passed to make the patent system efficient. Between 1793 and 1836, there was an increase in the number of patent applications. To organize and maintain patents for easy cross examination, the Patent Act of 1836 allowed the publishing of patents and made them publicly available through libraries. The availability of knowledge of an invention from the published patent documents created interest amongst the public. Due to increasing understanding amongst people of the economic value and advantages of inventions, the number of patent applications increased from 765 in 1840 to 21, 276 in 1867. A method for grouping similar patents under classes, begun in 1774, was also evolving simultaneously.
In the meantime, in England, the Statute of Monopolies continued to exist for over two hundred years. The Industrial Revolution and the Great Exhibition of 1851 lead to dramatic technological changes that were inefficiently addressed by the Statue of Monopolies. With growing concerns over the state of public affairs, the Government introduced the Patent Law Amendment Act of 1852 and the Patent Office was instituted. In a milestone achievement of the Act of 1902, patent documents from 1855 to 1900 were condensed and classified into 1022 volumes in 146 classes. The present day legislation on patenting follows the Patents Act of 1977.
On the lines of international collaboration, the need for worldwide accessibility to intellectual property systems, including patents, was recognized in the Paris Convention in 1883. The countries entered into the Convention (contracting countries) had accessibility to the IP systems of other countries party to the Convention. Currently there are 171 countries that are party to the Paris Convention. In an effort to provide further international cooperation, the World Intellectual Property Organization (WIPO) was established in 1967. WIPO is a specialized agency of the United Nations promoting the protection of intellectual property throughout the world. The signing of the Patent Cooperation Treaty in 1970, by various countries, has made it possible to file patent applications to protect inventions in each of the contracting country. Presently, there are 184 member countries of WIPO.
On similar lines, the European Patent Convention of 1973 resulted in the establishment of European Patent Office (EPO) that is responsible for granting European patents. The 32 contracting states have entered into a multi-lateral treaty creating an autonomous legal system for granting European patents.
Presently there are about 200 patent offices including the USPTO in US, Patent Office in UK, and EPO for European countries. Patent offices like ROSPATENT and SIPO of Russia and China are as recent as 1955 and 1980. The patenting system is fast growing even in countries like Ethiopia, Afghanistan, Angola and Papua New Guinea. Organizations like WIPO and EPO, additionally are promoting IP protection on a global scale.
Ash Tankha, US patent attorney, works with inventors to develop their ideas into patent application for worldwide filing and patenting. Contact Ash Tankha atash@ipprocurement.com or visit www.ipprocurement.com.
Article Source: ArticlesBase.com
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Please help me understand dual rail power supplies?
I don't really understand dual rail power supplies, How can you have a positive and negative voltage, and both flow to ground. How do you get a negative voltage? I know that in batteries (conventional current) current flows from positive to negative. I understand that AC current is the current keeps switching directions (alternating). I don't understand "dual rail power supplies" because ground means the negative terminal(-) in a power supply and the positive is usually represented with a (+) so where does the second negative mean?
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Common Source Amplifier, Current At the Source?
http://en.wikipedia.org/wiki/Common_source
In a basic Fet common source amplifier, what are the current characteristics from Source to Ground...
http://en.wikipedia.org/wiki/File:N-channel_JFET_common_source.svg
(Conventional Current)
When Vin = 0 :
a) current flows from source to ground
b) current flows from ground to source
c) current between these points stops
When Vin = +V :
a) current flows from source to ground
b) current flows from ground to source
c) current between these points stops
When Vin = -V :
a) current flows from source to ground
b) current flows from ground to source
c) current between these points stops
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Kirchhoff's loop rule and more complex circuits?
(a) What is the magnitude of the current that flows through branch AB?
(b) In what direction does the conventional current flow in branch AB?
(c) What is the magnitude of the current that flows through branch CD?
Diagram: http://i1220.photobucket.com/albums/dd452/PhysicsHelp1/Picture2-5.png
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Conventional Current Vs. Electron Flow?
I'm having a ridiculous time trying to understand these principles.
I found this diagram, which will help me to illustrate my confusion:
http://ocw.weber.edu/automotive-technology/ausv-1320-automotive-electronics/images/automotivecircuit
Okay, so in Conventional Current, it is assumed that current will flow out of the positive terminal. It will proceed around the circuit, and under the right conditions, will end up at the negative terminal. The fuse that is present right after the positive terminal would therefore protect the circuitry from an event that would create excess current that would otherwise damage it.
However, according to Electron Flow, current flows from the negative terminal to the positive terminal. Since this is the reality, I simply don't understand how having a fuse at the positive terminal could protect the circuit. I know that it would work, as that's what the empirical evidence points to, but I simply don't understand why.
Now whenever I look at a schematic, I just don't understand. I've looked at a plethora of webpages that serve to demystify the principle, but none of them make any sense to me. :/
Help would be greatly appreciated!
Thanks!
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Does a conventional current even exist then?
People use to say current flowed from + to -. But this proved to be wrong. Currents flow from - to +.
Doesn't that mean that conventional currents don't exist. electrons are negative and they are what is being carried round the circuit so it is always from - to positive, not + to -.
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Magnetic Field Question?
The two main concepts in this chapter are:
Moving charges create magnetic fields & Magnetic fields exert forces on moving charges. You have decided to make a home made cyclotron (particle accelerator). You decide to use a household circuit use a 120V, 15 Amp circuit. If 14-gauge copper wire has a resistance per unit length of 3 ohm per 1000ft, what length of wire is required to limit the current to 15A?
Next, your "cyclotron" needs to have a region of constant magnetic field. To create this, you choose to wrap the wire in a circular loop of radius 0.5-m. What is the maximum magnetic field you can create? (you need to figure out the number of loops!)
Finally you inject the electrons into your cyclotron. What is the speed of the electrons if they move in a radius of 0.25-m? If the electrons started from rest, what potential difference is required to generate that speed?
Finally, as viewed from above the electrons are moving counter clockwise. What direction is the magnetic field? What is the direction of the conventional current in the wire loop? When you answer this, be sure to provide enough description of the right hand rules.
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I don't know where to start?
Two parallel conducting rails, separated by a distance of 2 m, are connected through a resistor as shown. A uniform magnetic field of 2 T is perpendicular to the plane of the loop and a conducting bar of mass 4 kg is free to slide without friction across the rails.
a) Determine at what speed the bar must be moved, and in what direction, to induce a counterclockwise conventional current of 2 Amperes as shown.
b) Determine the magnitude and direction of the external force that must be applied to the bar to keep it moving at the velocity found in part (a).
c) Determine the rate at which heat is being produced in the resistor and determine the mechanical power being supplied to the bar.
d) Suppose that the external force is suddenly removed from the bar. Determine the energy in Joules dissipated in the resistor before the bar comes to rest.
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