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Day in Engineering History Archive - April 3

| Jan | Feb | Mar | Apr | May | Jun |
| Jul | Aug | Sep | Oct | Nov | Dec |

Note: These historical tidbits have been collected from various sources, mostly on the Internet. As detailed in this article, there is a lot of wrong information that is repeated hundreds of times because most websites do not validate with authoritative sources. On RF Cafe, events with hyperlinks have been verified.
Please submit significant historical events and dates for inclusion in these lists. I will be glad to include your name and birthday. Please do not submit your death date ;-) A couple years ago, I began commemorating the birthdays of notable people and events with special RF Cafe logos. Where available, I like to use images from postage stamps from the country where the person or event occurred.

April 3

World's first cellphone call placed. Click here to return to the RF Cafe homepage.

1449: The first known British patent was issued to John of Utynam for a method of making stained glass. 1827: German physicist Ernst Chladni, known as "the father of acoustics," died. 1829: James Carrington patented his coffee mill - a very important invention! 1860: Pony Express service was inaugurated in San Francisco; it lasted only a year and a half once the telegraph came online. 1948: President Truman signed the Economic Recovery Act, known as Marshall Plan, which allocated more than $5 billion in aid for 16 European countries. 1965: The SNAP 10 ion engine satellite became the first nuclear reactor to orbit Earth. 1973: The first portable phone (cellphone) call was placed by Motorola employee Martin Cooper on his 10"x3"x1.5", 30 oz DynaTAC "shoebox phone." 1996: Unabomber Theodore Kaczynski was arrested. 2000: the Nasdaq set a one-day record when it lost 349.15 points (before Bush was even elected).


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