DK31296C
(en )
1923-02-12
Apparatus for Sealing Heating Pipes in Boiler Walls.
DK30600C
(en )
1922-11-06
Apparatus for cleaning flue pipes or similar in steam boilers.
DK29795C
(en )
1922-06-26
Apparatus for Measuring Heat Amounts.
DK32666C
(en )
1923-12-24
Apparatus for Cleaning the Pipes in Water Pipe Boilers.
DK24241C
(en )
1919-03-17
Apparatus for Blowing Soot in Boiler Pipes.
DK27707C
(en )
1921-05-30
Apparatus for Sealing Flue Pipes in Steam Boilers and Liners.
DK34883C
(en )
1925-08-17
Apparatus for Cleaning the Pipes in Water Pipe Boilers.
DK31645C
(en )
1923-04-30
Water supply pipes for gas generators.
DK29120C
(en )
1922-01-02
Boiler for Water Heating System.
DK35896C
(en )
1926-04-19
Apparatus for Softening Water.
DK34315C
(en )
1925-03-30
Apparatus for Softening Water.
DK33718C
(en )
1924-09-29
Apparatus for heating water and other liquids.
DK28073C
(en )
1921-07-25
Device for Water Pipe Boilers.
DK39229C
(en )
1928-09-10
Apparatus for Cleaning Steam Boilers.
DK30800C
(en )
1922-11-27
Portable Apparatus for Economical Generation of Heat.
FR601566A
(en )
1926-03-04
Special furnace for pipes
DK37065C
(en )
1927-01-31
Apparatus for Supplying Gases to Liquids.
DK31906C
(en )
1923-06-25
Apparatus for Treating Margarine.
DK34693C
(en )
1925-07-06
Procedure and Apparatus for Bleeding Boiler Feed Water.
DK39194C
(en )
1928-09-03
Apparatus for Heating Water.
DK32583C
(en )
1923-12-03
Shut-off tap for heaters.
DK35113C
(en )
1925-10-05
Apparatus for heating liquids.
DK31243C
(en )
1923-02-05
Apparatus for Sterilizing Liquids.
DK33516C
(en )
1924-08-11
Boiler or Apparatus for Heating Liquids.
FR598924A
(en )
1925-12-29
Heat recovery unit for boiler flue pipes