Mammoth Cave, the world's longest known cave system. The following is a list of the world's 10 longest caves per length of documented passageways. Many passageways are still being discovered; this list is based on the latest verifiable data.
patent medicine - medicine that is protected by a patent and available without a doctor's prescription. medicament, medication, medicinal drug, medicine - (medicine) something that treats or prevents or alleviates the symptoms of disease. nostrum - patent medicine whose efficacy is questionable.
From Wikipedia, the free encyclopedia. A biological patent is a patent on an invention in the field of biology that by law allows the patent holder to exclude others from making, using, selling, or importing the protected invention for a limited period of time.nder the umbrella of biotechnology, applications for patents on biological inventions are examined according to general guidelines for patents. In response to requests for additional clarity, the Japan Patent Office (JPO) set forth specific guidelines for biology-related inventions.