Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Inventor:
Purhonen; Matti
Address:
Helsinki, FI
No. of patents:
3
Patents:












Patent Number Title Of Patent Date Issued
D287159 Valve for equalizing pressure resulting from explosions or blasts December 9, 1986
4733606 Closure device March 29, 1988
A closure device for shelters and the like. The frame (1) of the closure device is provided with at least one flow-through passage (2); a closure (3) is mounted displaceably in each passage; and a counter part is formed in the frame for each closure. The closure is displaceable between a
4109754 Noise absorber for air or gas flows August 29, 1978
A noise absorber for air or gas flows, which comprises a flow channel provided at opposite ends with flow inlet and outlet connections. One pair of opposite walls of the flow channel extends concavely and the other pair of opposite walls extends convexly from the inlet connection to the










 
 
  Recently Added Patents
Managing device functionality during predetermined conditions
High performance actuator motor
In-vehicle electronic control apparatus having monitoring control circuit
Video conference
Portable stand
Method and apparatus for over-the-air activation of neighborhood cordless-type services
Prevention and reduction of blood loss
  Randomly Featured Patents
Aqueous alkylketene dimer dispersions
Plasma facing components of nuclear fusion reactors employing tungsten materials
System and method for optical scanner sensitivity adjustment
Glass panel for entry systems
Method of fabricating solid electrolytic capacitor and solid electrolytic capacitor
Video display signal brightness control circuit
Systems and methods for securing cardiovascular tissue
Method for inspecting the elements of piping systems by electromagnetic waves
Scanning optical system including optical system for detecting an information beam
Vehicular windshield washer system