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Spring - The inventor Vladimir K. Zworykin was hired by the businessman David Sarnoff. Zworykin was put him in charge of television development for the Radio Corporation of America (RCA) at its factories and laboratories in Camden, New Jersey. Zworykin's move to the RCA's Camden laboratories occurred in the spring of 1930. The difficult task of developing a transmitter could begin. There was an in-house evaluation in mid-1930, where the kinescope (cathode ray tube) performed well, but with only 60 lines for definition.
March 30 - On March 30, Philo Farnsworth applied for a patent for his "electron multiplier". He demonstrated its application in 1931.
August 26 - The inventor Philo Farnsworth was granted his first television patent on August 26, 1930. By that time Farnsworth had moved to San Francisco. He set up his new lab at 202 Green Street.
Specific date unknown - In 1930, RCA agreed to occupy the yet-to-be-constructed landmark skyscraper of the Rockefeller Center complex, 30 Rockefeller Plaza. In 1933, the building became known as the RCA Building (renamed the GE Building in 1988 and currently known as the Comcast Building after Comcast bought NBC-TV). This lease was critical for enabling the massive project to proceed as a commercially viable venture. David Rockefeller cited RCA's action as being responsible for "the salvation of the project". John D. Rockefeller Jr. quickly negotiated with RCA and its subsidiaries, National Broadcasting Company (NBC) and Radio-Keith-Orpheum(RKO), to build a mass media entertainment complex on the site.