Resources Contact Us Home
Purhonen; Matti
Helsinki, FI
No. of 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
Dye sensitised solar cell
Carbonate and carbamate modified forms of glucocorticoids in combination with .beta..sub.2 adrenergic agonists
Medical capsule housing formed by thermal welding
Controller interface providing improved data reliability
Signal processing apparatus and methods
Dynamic report mapping apparatus to physical data source when creating report definitions for information technology service management reporting for peruse of report definition transparency a
Anti-phishing system and method
  Randomly Featured Patents
Methods, kits, and compositions for generating new hair follicles and growing hair
Polarization-sensitive coupled fiber-optic biosensor
Fluorocopolymer and its applications
Substituted .omega.-pentanorprostaglandins
Submarine power station and assembly thereof
Method of producing hybrid polymer-inorganic materials
Stand off for electrical connection in an underground well
Device for banding branches of a palm tree
Adjustable shielding plate for adjusting an etching area of a semiconductor wafer and related apparatus and methods
Collapsible portable bird perch