Wilhelm Hegler — 24 Patents at Unknown

Wilhelm Hegler has been granted 24 US patents while listed as an inventor at Unknown. The first was granted in 1980 and the most recent in November 1999. Wilhelm Hegler ranks #168,038 of 4,157,543 US inventors in our database (top 4.0%). Patent records list Wilhelm Hegler in Bad Kissingen, DE.

Patents per Year

Issued Patents All Time

Showing 1–24 of 24 patents

Patent #	Title	Co-Inventors	Date
5976298	Method of producing multilayer thermoplastic pipe	Ralph-Peter Hegler	1999-11-02
5953974	Apparatus for cutting slots in corrugated and twin-wall pipes	Ralph-Peter Hegler	1999-09-21
5560941	Apparatus for the manufacture of corrugated pipes of thermoplastic plastics	Ralph-Peter Hegler	1996-10-01
5511964	Apparatus for the production of plastic pipes	Ralph-Peter Hegler	1996-04-30
5489403	Method for welding pipe pieces made of thermoplastics	Ralph-Peter Hegler	1996-02-06
5472659	Method for continuously manufacturing compound corrugated pipe having smooth portions	Ralph-Peter Hegler	1995-12-05
5393211	Apparatus for the manufacture of a plastic pipe having transverse profile features	Ralph-Peter Hegler	1995-02-28
5346384	Apparatus for the production of plastic pipes	Ralph-Peter Hegler	1994-09-13
5320697	Method for welding together pipes consisting of thermoplastic plastics	Ralph-Peter Hegler	1994-06-14
5320797	Method and apparatus for the continuous manufacture of a compound pipe with a pipe socket	Ralph-Peter Hegler	1994-06-14
5141427	Apparatus for the production of plastic pipes	Ralph-Peter Hegler	1992-08-25
5071173	Plastic pipe for sewer pipe reconstruction	Ralph-Peter Hegler	1991-12-10
4930936	Partial-seepage drainage pipe with mating sleeve	Ralph-Peter Hegler	1990-06-05
4915425	Pipe connecting element	Ralph-Peter Hegler	1990-04-10
4900503	Method and apparatus for producing a finned tube from synthetic plastics material	Ralph-Peter Hegler	1990-02-13
4779651	Plastic corrugated tube with integrally molded sleeve coupler	Ralph-Peter Hegler	1988-10-25
4773451	Double tubing comprising two protective tubes integrally joined to one another by a web	Ralph-Peter Hegler	1988-09-27
4513787	Corrugated sheathing hose	Ralph-Peter Hegler	1985-04-30
4492551	Apparatus for the production of plastic pipes with transverse grooves	Ralph-Peter Hegler	1985-01-08
4488467	Apparatus for cutting openings in pipes	Ralph-Peter Hegler	1984-12-18
4381276	Process and apparatus for the fabrication of a flat-shaped hollow body	Ralph-Peter Hegler	1983-04-26
4303104	Double-wall plastic tubing in which the outer wall has transverse corrugations and the inner wall is smooth	Ralph-Peter Hegler	1981-12-01
4212618	Apparatus for the manufacture of transversely contoured tubing from thermoplastic material	Ralph-Peter Hegler	1980-07-15
4184831	Apparatus for producing plastic drain pipes	Ralph-Peter Hegler	1980-01-22