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What happens to a patent when it expires?

it becomes the property of the state
ownership rights are inherited
the patent is licensed
It becomes public domain
A patent allows you, and only you, to profit from your genius when you invent something new. No one else can manufacture or sell your invention unless you give permission. When a patent expires, anyone can copy your idea and market it. It becomes public domain
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Answers by country

it becomes the property of the state
ownership rights are inherited
the patent is licensed
It becomes public domain
answers
flagAustralia
4%
4%
0%
91%
24
flagthe Netherlands
6%
0%
0%
80%
15
flagRepublic of Ireland
20%
0%
0%
80%
15
flagSwitzerland
15%
10%
0%
75%
20
flagthe United States
10%
11%
5%
73%
79
flagPakistan
20%
0%
6%
73%
15
flagthe United Kingdom
12%
9%
9%
68%
96
flagAustria
16%
0%
16%
67%
37
flagPoland
15%
11%
6%
65%
2537
flagCanada
18%
18%
0%
63%
11
flagGermany
16%
7%
14%
61%
181
flagEgypt
25%
16%
0%
58%
12
flagGreece
27%
9%
18%
45%
11
flagIndia
35%
2%
23%
38%
42

What is the the largest fluvial group of islands in the world ?

Bananal Island
Grande de Gurupá
Isla Margarita
Tupinambarana

In World War II, a Nazi submarine U-1206 was accidentally sunk by?

Ball lightning
Mating whales
A sub-sea landslide
An improperly operated toilet

Where is the sculpture from the photo located?

in Barcelona
in Prague
in Oslo
in Copenhagen

Who created Scrabble?

Damien Monnier
James Brunot
Alfred Butts
Edgar Allan Poe