
1929 - October 29 - Black Tuesday - Stock market crash - The Great Depression Begins - It lasted until 1941 (WW2)
1930 - Grafton, Massachusetts
Name: John Koper
Birth Year: abt 1918
Gender: Male
Race: White
BirthPlace: Massachusetts
Marital Status: Single
Relation to Head of House: Son
Home in 1930: Grafton, Worcester, Massachusetts, USA
Map of Home: View Map
Street address: Second Street
House Number: 20
Dwelling Number: 243
Family Number: 274
Attended School: Yes
Able to Read and Write: Yes
Father's BirthPlace: Lithuania
Mother's BirthPlace: Lithuania
Language Spoken: Lithuanian
Able to Speak English: Yes
Household Members:
Name Age
Frank J Koper 38
Elizabeth M Koper 41
John Koper 12
Frank Koper 11
Joseph W Koper 9

1934 - The metal beverage can is invented (American Can Co., United States)

1940 - April - 1st electron microscope demonstrated (RCA), Philadelphia, Pennsylvania, USA
World War II Army Enlistment
Name: John P Kopa
Name (Original): KOPA JOHN P
Event Type: Military Service
Event Date: 13 Mar 1942
Term of Enlistment: Enlistment for the duration of the War or other emergency, plus six months, subject to the discretion of the President or otherwise according to law
Event Place: Cp Upton, Yaphank, New York, United States
Residence Place:
Race: White
Citizenship Status: citizen
Birth Year: 1917
BirthPlace: MASSACHUSETTS
Education Level: 4 years of high school
Civilian Occupation: Bookkeepers and cashiers, except bank cashiers
Marital Status: Single, without dependents
Military Rank: Private
Army Branch: Branch Immaterial - Warrant Officers, USA
Army Component: Selectees (Enlisted Men)
Source Reference: Enlisted Man, Regular Army, after 3 months of Discharge
Serial Number: 32227548
Affiliate Publication Title: Electronic Army Serial Number Merged File, ca. 1938-1946
Affiliate ARC Identifier: 1263923
Box Film Number: 04832.147

The microwave oven was invented accidentally in 1945 by Percy Spencer, a Raytheon engineer. While testing a magnetron, he noticed microwaves melted a candy bar in his pocket. Experimenting further, he discovered microwaves could cook food quickly. Raytheon patented the process, and by 1947, they built the first commercial microwave oven, called the 'Radarange.' Initially used in commercial settings, microwaves becomes affordable for home use by the 1960s and 1970s, revolutionizing cooking.
Death
Name: John P Kopa
Gender: Male
Age: 43
Birth Date: abt 1918
Residence Place: Greenwich, Washington, New York, USA
Death Date: 30 Jun 1961
Death Place: New York, USA
Certificate Number: 45568
Ancestry.com. New York State, Death Index, 1957-1968 [database on-line]. Lehi, UT, USA: Ancestry.com Operations, Inc., 2018.
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