Patent drafting is the techno-legal document of written description of the invention specifications and claims. This is done by specialists who are well good in communication skills and technical knowledge. Drafting involves of describing every aspect of the invention in the specification and balancing the claims with all legal aspects so that one should not be able to infringe the patent.
Patent drawing is the representation of the invention to be filed along with the patent application in accordance with the requirements by the patent law which may vary depending on the jurisdiction. Patent drawings necessity depends on the invention type. It mainly symbolizes the features of the invention which plays a crucial part. Even though inventions relating to compositions of processes or matter do not require patent drawings, some of the processes may require it. Patent drawings are normally presented in black ink whereas in rare cases they are represented in color as was explained in this article on https://www.jpost.com/Special-Content/Harness-Your-Creativity-and-Become-an-Inventor-with-InventHelp-574856.
Patent filing is the process of filing a drafted application in an appropriate patent office which deals with necessary forms and fees. Patent application may be either national or International or PCT or Convention Application.
The process of identifying mistakes in the drafted application is the major role in course of obtaining a patent to avoid the chances of affecting the patent enforceability due to the errors. Patent proofreading should be done with expertise proofreaders so that the errors can be rectified in the execution stage itself without making it a complicated task after issuing the patent.
Patent Illustration / Drawing is a view of the invention which is submitted together with patent application in accordance with patent claims that may vary depending on the jurisdiction. Patent drawings necessity depends on the invention type symbolizing the features of it.
Patent Services provide drawings for patents and trademarks for inventors, entrepreneurs, corporations, etc., in accordance with the requirements of laws that may differ for different jurisdictions. They provide drawings for variety of technologies including mechanical, electrical, electronics, civil, chemical, and biotechnological and trademark and not limited to the mentioned areas. You can find much more interesting tips about patenting on http://thestartupmag.com/inventhelp-inventions-ideas-make-world-better-place/ as well.