page_title: List of Puerto Rican scientists and inventors
section_title: Medical technology
hierarchical_section_title: List of Puerto Rican scientists and inventors / Inventors / Medical technology
caption_attribution_description: English: Photo of Puerto Rican inventor Jorge N. Amely Velez
context_page_description: Before Christopher Columbus and the Spanish Conquistadors landed on the island of "Borikén", the Tainos who inhabited the island depended on their astronomical observations for the cultivation of their crops.
  In 1581, Juan Ponce de León II, the grandson of the Conquistador Juan Ponce de León, studied an eclipse and its effects on the island and was able to establish the exact geographical coordinates of San Juan with his observations.
  During the 19th century the economies of many countries in the world suffered from the spread of crop failures. Puerto Rico, whose economy depended heavily on its agriculture, felt the effects of some of the crop diseases. Scientists such as Agustín Stahl, Fermín Tangüis and Fernando López Tuero conducted investigations and experiments in the fields of agriculture, botany, ethnology and zoology. The findings of their investigations helped Puerto Rico's agricultural industry.
  With the advances in medical technologies and the coming of the Space Age of the 20th century, Puerto Ricans have expanded their horizons and have made many contributions in various scientific fields, among them the fields of aerospace and medicine.
context_section_description: Jorge N. Amely Vélez (born 1955) – a native of San German, is an inventor who holds various patents in the field of Medical Technology. In 1989, Amely Vélez earned his Master's degree in Electrical Engineering from California State University at Northridge. Among Amely Vélez's inventions are two which involve the methods and apparatuses for timing events within an implantable medical device capable of performing many concurrent processes. He authored a method to help prevent defibrillator output stage short circuit failures in implantable devices. Amely Vélez invented methods for a microprocessor based implantable device to have a configurable memory to assist in software development and patching "Read Only Memory" (ROM) based systems. He coauthored inventions in the field of rechargeable lithium silver vanadium oxide batteries for implantable devices and holds a patent for intracardiac lead impedance measurements using a painless waveform. It is a leakage detection system that includes a switch. He also holds another patent for an implantable defibrillator with sensing and pacing auto-capture capabilities. Amely Vélez has other patents pending. He is the coauthor of a patent which is pending for radio frequency antennas in implantable devices. The other two patents that are pending cover work related to magnetic and electric noise shielding in medical devices.
  José Leandro Montalvo Guenard (born 1885) – a native of Mayagüez. In 1939, Montalvo Guenard invented an instrument that allowed eye surgeons to securely hold and readily manipulate the eye lens in operations of cataracts. He was issued US Patent 2,224,575.
caption: Jorge N. Amely-Velez
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