There are tens of millions of long vertical ladders around the world - that are dangerous & hard to climb
- VERTICAL STAIRS are far safer & easier to climb
This radical, ergonomically superior design, could displace $100 billion of existing ladder infrastructure in a rapidly GROWING market - THAT INCLUDES cell TOWERS; WIND TOWERS; cranes; silos; fire escapes & manholes
MANUFACTURERS WANTED
"Walk Straight Up"
Steel Vertical Stairs
Aluminium Vertical Stairs
Vertical Ladders
.png)
PATENTS GRANTED 20yrs:
Australia 201567280
USA US-10,240,392-B2
China ZL-201580070082.X
Japan 6542892
Europe EP-3234295
UK, Ireland, Germany, Belgium, France
PATENTS PENDING:
Mexico MX/a/2017/007657
India 201717019866
Indonesia P00201704627
Vertical Ladders don't support the Centre Of Gravity
of the climber.
Vertical Stairs Do.
Manufacturers are sought to make, market & distribute VERTICAL STAIRS under license from the patent holders.