🧠 Inventions of 1931
Breakthroughs and everyday innovations from the year.
1 
Electron Diffraction Camera
2 
Air Traffic Control System
3 
Pressure Cooker Modern Design
4 
Concrete Vibrator
5 
Electric Razor
6 
Automatic Elevator Controls
7 
Optical Sound-on-Film System
8 
Polyvinyl Chloride Commercialization
9 
Aircraft De-Icing System
10 
Early Radar Experiments
Wall Street Time Machine
The Right Call: If you'd invested $1,000 in any one of these companies in 1931, here's what it would be worth in 2025.
Rank #1
PG
Procter & Gamble
Price in 1931
$0.25
Value in 2025
$586,657
Procter & Gamble - If you invested $1,000 in 1931, it would be worth $586,657 today (586.7x return)
Rank #2
CVX
Chevron
Price in 1931
$0.31
Value in 2025
$474,914
Chevron - If you invested $1,000 in 1931, it would be worth $474,914 today (474.9x return)
Rank #3
GE
General Electric
Price in 1931
$0.62
Value in 2025
$487,500
General Electric - If you invested $1,000 in 1931, it would be worth $487,500 today (487.5x return)
🦸 Top 5 Comics
Detective Dan: Secret Operative No. 48 (Issue #1)
$150
Bungleton Green (Issue #1)
$50
Tarzan The Fearless (Issue #1)
$100
Buck Rogers (Issue #1)
$200
Famous Funnies: A Carnival of Comics
$2,250
🧸 Top 5 Toys
Tinker Toys
$150.00
Yo-Yo
$1350.00
Model Train Sets
$1,500.00
Ernst Plank Tin Toys
$2,895.00
Wooden Building Blocks
$150.00
⚾ Top 5 Trading Cards
Honus Wagner (Biscuit Card)
$3,000,000
1931 W517 Babe Ruth
$250,000
1931 Wings Cigarettes Future Reigndeers
$60,000
1931 Player'S Cigarettes Kings & Queens Of England
$330.99
1931 J. Millhoff & Co Famous Golfers Bobby Jones
$157.74