Salim reported from Ibn Umar (Allah be pleased with them) that 'Umar donated a horse in the path of Allah and then found it being sold....
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Salim reported from Ibn Umar (Allah be pleased with them) that 'Umar donated a horse in the path of Allah and then found it being sold, and he decided to buy that. He asked Allah's Apostle (SAW) about it, whereupon Allah's Messenger (SAW) said:
Umar, do not get back what you gave as charity.
Sahih Muslim, Book 24, Hadith 7
The development of FM radio was mired in litigation and tragedy
In 1934, amidst the Great Depression, the radio industry thrived, thanks to Edwin Armstrong's innovations. His regenerative circuit, super-regeneration circuit, and superheterodyne receiver significantly improved radio receivers. However, despite his groundbreaking work, Armstrong faced numerous challenges.
Armstrong's patent for the regenerative circuit was disputed by Lee De Forest, who had patented a similar invention two years later. The Supreme Court ultimately ruled in favour of De Forest, stripping Armstrong of his patent.
Undeterred, Armstrong continued to innovate. He developed Frequency Modulation (FM) radio, which improved sound quality by varying the radio waves' frequency. Armstrong won a patent for FM radio in 1933 and conducted successful field tests.
Before World War II, Armstrong lobbied the FCC to create an FM broadcast spectrum. He built an experimental station and began manufacturing receivers. However, powerful individuals, including David Sarnoff, founder of RCA, sought to suppress FM radio to protect their AM radio interests.
The FCC eventually moved the FM spectrum, rendering Armstrong's equipment obsolete. Armstrong became embroiled in a new patent suit with RCA and NBC, which further strained his finances and health.
Tragically, Armstrong took his own life in 1954, believing he had failed to establish FM radio. However, his widow continued to fight for his patents, eventually winning over $10 million in damages. FM radio eventually gained popularity, surpassing AM radio in the 1970s. Today, Armstrong's innovations are recognized as revolutionary, and his legacy continues to shape the broadcasting industry.
