Inventor · disambiguated record
Keijo Hellgren
Also filed as: HELLGREN KEIJO · HELLGREN KEIJO E
21 granted patents·1 pending application·187 citations·filing 1976–2006
95Inventor score
Top patents by PatentIndex Score
22 records- 0180US4676086APress of pressure cell typeASEA AB·Filed 1986·Granted Jun 30, 1987·27 cites·9 claims
- 0276US4658618AForming press of the pressure cell typeASEA AB·Filed 1986·Granted Apr 21, 1987·22 cites·9 claims
- 0372US4711111AForming press mat utilizes trays formed of thin bottom plates and separate annular framesASEA AB·Filed 1986·Granted Dec 8, 1987·19 cites·4 claims
- 0471US7096774B2High pressure press, method for operating a high pressure press and use of such a pressAVURE TECHNOLOGIES AB·Filed 2001·Granted Aug 29, 2006·8 cites·13 claims
- 0568US7155948B2Forming toolAVURE TECHNOLOGIES AB·Filed 2003·Granted Jan 2, 2007·8 cites·6 claims
- 0668US4080139AHydraulic pressASEA AB·Filed 1976·Granted Mar 21, 1978·15 cites·9 claims
- 0764US7155949B2Fluid cell press with a gripping arrangement and method and use of the pressAVURE TECHNOLOGIES AB·Filed 2003·Granted Jan 2, 2007·6 cites·38 claims
- 0864US4693103AForming press of the pressure cell type and a process for changing diaphrams in such a pressASEA AB·Filed 1986·Granted Sep 15, 1987·15 cites·8 claims
- 0960US7150177B2Hydraulic press with a pressure cell and a method and use for it, whose press body consists of prestressed lamellasAVURE TECHNOLOGIES AB·Filed 2001·Granted Dec 19, 2006·4 cites·30 claims
- 1059US7509827B2Device and method for expansion formingAVURE TECHNOLOGIES AB·Filed 2003·Granted Mar 31, 2009·5 cites·36 claims
- 1158US6178796B1Device and method for shaping flat articlesFLOW HOLDINGS GMBH SAGL LLC·Filed 1999·Granted Jan 30, 2001·12 cites·15 claims
- 1257US7150171B2Pressure cell press comprising a tray, and a method for manufacturing said trayAVURE TECHNOLOGIES AB·Filed 2003·Granted Dec 19, 2006·4 cites·41 claims
- 1355US7127925B2Diaphragm support and a method for initial sealing in a pressure cellAVURE TECHNOLOGIES AB·Filed 2001·Granted Oct 31, 2006·2 cites·25 claims
- 1455US4105388AHydraulic pressASEA AB·Filed 1976·Granted Aug 8, 1978·13 cites·6 claims
- 1550US7320211B2Method of exchanging a diaphragm deviceAVURE TECHNOLOGIES AB·Filed 2006·Granted Jan 22, 2008·0 cites·9 claims
- 1648US4112724ATransportation units for supporting and moving plate-formed attachment member into and out of a press stand of hydraulic pressASEA AB·Filed 1977·Granted Sep 12, 1978·9 cites·7 claims
- 1744US6439018B1Device and method for expansion formingFLOW HOLDINGS GMBH SAGL LLC·Filed 1999·Granted Aug 27, 2002·7 cites·11 claims
- 1842US4163378AHydraulic pressASEA AB·Filed 1978·Granted Aug 7, 1979·5 cites·7 claims
- 1941US7461531B2Press plant and a method and use for it with a pressure cell and a divisible trayAVURE TECHNOLOGIES AB·Filed 2001·Granted Dec 9, 2008·0 cites·24 claims
- 2039US2004065138A1Hydraulic press with pressure cell with a tray whic consists of prestressed lamellasFiled 2001·Application pending·0 cites
- 2132US6183812B1Method for treatment of woodFLOW HOLDINGS GMBH SAGL LLC·Filed 1996·Granted Feb 6, 2001·3 cites·19 claims
- 2227US6053224ADevice for pressure treatment of woodFLOW HOLDINGS GMBH SAGL LLC·Filed 1996·Granted Apr 25, 2000·3 cites·12 claims
Join the waitlist — get patent alerts
Get an alert when Keijo Hellgren files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →