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Tombac, or tombak, is a brass alloy with high copper content and 5–20% zinc content. [1] Tin , lead or arsenic may be added for colouration. [ 2 ] [ 3 ] It is a cheap malleable alloy mainly used for medals , ornament , decoration and some munitions .
Please see external links for images of buttons (front & back) made from the material(s) in question. ("NBS name" refers to labelling used by the National Button Society, USA.) ("NBS name" refers to labelling used by the National Button Society, USA.)
Silicon tombac has good friction bearing characteristics and is corrosion resistant but is not resistant to ammonia atmosphere. The strength properties are largely retained at application temperatures up to 200 °C. [1] It is a special alloy in terms of the combination of casting process and casting temperature.
Mario Cardullo's device, patented on January 23, 1973, was the first true ancestor of modern RFID, [10] as it was a passive radio transponder with memory. [11] The initial device was passive, powered by the interrogating signal, and was demonstrated in 1971 to the New York Port Authority and other potential users.
Republic Act No. 8293 or the "Intellectual Property Code of the Philippines" is the primary law with regards to the copyright law of the Philippines as well as the establishment of the Intellectual Property Office of the Philippines. [1] Republic Act No. 8293 is an amendment of the Revised Penal Code of the Philippines and was legislated in ...
IMI Energy Solutions at Fremont, California, USA. IMI started on August 8, 1980 as a joint venture between Ayala Corporation and Resins, Inc. With its headquarters in Muntinlupa, they were just a workforce of around 100 employees with total fixed assets of US$3,700,290 and it is engaged in the assembly of integrated circuits.
A wireless identification and sensing platform (WISP) is an RFID (radio-frequency identification) device that supports sensing and computing: a microcontroller powered by radio-frequency energy. [1] That is, like a passive RFID tag, WISP is powered and read by a standard off-the-shelf RFID reader, harvesting the power it uses from the reader's ...
Automated Firearms Identification has its roots in the United States, the country with the highest per capita firearms ownership. [1] [2] In 1993, the Federal Bureau of Investigation commissioned Mnemonics Systems Inc. to develop Drugfire, which enabled law enforcement agencies to capture images of cartridge casings into computers, and automate the process of comparing a suspect cartridge ...