FR33050E
(en )
1928-06-11
Improvements made to spark plugs in internal combustion engines
FR647303A
(en )
1928-11-22
Improvements to spark plugs for internal combustion engines
FR618316A
(en )
1927-03-07
Improvements made to spark plugs in explosion engines
FR643979A
(en )
1928-09-29
Improvements to spark plugs for internal combustion engines
FR661216A
(en )
1929-07-23
Improvements to spark plugs for internal combustion engines
FR630218A
(en )
1927-11-25
Spark plug for internal combustion engines and other applications
FR643166A
(en )
1928-09-11
Improvements to spark plugs for internal combustion engines
FR646622A
(en )
1928-11-14
Improvements to spark plugs for internal combustion engines
FR654271A
(en )
1929-04-04
Improvements to spark plugs for internal combustion engines
FR635100A
(en )
1928-03-07
Improvement in spark plugs for internal combustion engines
FR637871A
(en )
1928-05-10
Improvements to spark plugs for internal combustion engines
FR655831A
(en )
1929-04-24
Improvements to spark plugs for internal combustion engines
FR630274A
(en )
1927-11-30
Improvements to spark plugs used in internal combustion engines
FR584995A
(en )
1925-02-19
Improvements to spark plugs for internal combustion engines
FR598875A
(en )
1925-12-28
Improvements to spark plugs for internal combustion engines
FR622210A
(en )
1927-05-25
Spark plugs of internal combustion engines
FR591377A
(en )
1925-07-03
Improvements in the distribution of internal combustion engines
FR614364A
(en )
1926-12-13
Improvements to spark plugs for internal combustion engines
FR616388A
(en )
1927-02-01
Improvements to spark plugs for internal combustion engines
FR687018A
(en )
1930-08-04
Improvements made to spark plugs in explosion engines
FR637029A
(en )
1928-04-21
Improvement in spark plugs for internal combustion engines
FR726703A
(en )
1932-06-02
Improvements to spark plugs for combustion or internal combustion engines
FR578317A
(en )
1924-09-23
Improvements to spark plugs for internal combustion engines
FR650910A
(en )
1929-02-12
Improvements made to electrodes, in particular those of spark plugs for internal combustion engines
FR631523A
(en )
1927-12-22
Spark plugs for internal combustion engines