4 entries match your criteria.
Historical Markers in Cobb Island, Maryland
La Plata is the county seat for Charles County
Cobb Island is in Charles County
Charles County (150) ►
ADJACENT TO CHARLES COUNTY
Calvert County (153) ►
Prince George's County (644) ►
St. Mary's County (297) ►
Fairfax County, Virginia (710) ►
King George County, Virginia (22) ►
Prince William County, Virginia (660) ►
Stafford County, Virginia (213) ►
Westmoreland County, Virginia (103) ►
Touch name on this list to highlight map location.
Touch blue arrow, or on map, to go there.
ADJACENT TO CHARLES COUNTY
Calvert County (153) ►
Prince George's County (644) ►
St. Mary's County (297) ►
Fairfax County, Virginia (710) ►
King George County, Virginia (22) ►
Prince William County, Virginia (660) ►
Stafford County, Virginia (213) ►
Westmoreland County, Virginia (103) ►
Touch name on this list to highlight map location.
Touch blue arrow, or on map, to go there.
1 ► Maryland, Charles County, Cobb Island — Milestone in Radio History — ![]() |
Here on Cobb Island, in December 1900, Reginald Aubrey Fessenden, assisted by Frank W. Very, while experimenting in wireless telephony, for the first time sent and received intelligible speech by electromagnetic waves between two masts 50 feet high . . . — — Map (db m81199) HM |
2 ► Maryland, Charles County, Cobb Island — Milestone in Radio History — December 23, 1900 — ![]() |
On December 23, 1900, Reginald Fessenden made the first wireless transmission of human speech; that memorable event took place right here on Cobb Island, Maryland. While Marconi is credited with the invention of the wireless telegraph, it was . . . — — Map (db m129054) HM |
3 ► Maryland, Charles County, Cobb Island — Milestone in Radio History — Professor Frank Very — ![]() |
On December 23, 1900, Reginald Fessenden made the first wireless transmission of human speech between two sets of 50-foot masts erected along the shore of Cobb Island. The message ("Hello. One, two, three, four. Is it snowing where you are Mr. . . . — — Map (db m129090) HM |
4 ► Maryland, Charles County, Cobb Island — Milestone in Radio History — Reginald Aubrey Fessenden — ![]() |
On December 23, 1900, Reginald Fessenden made the first wireless transmission of human speech between two sets of 50-foot masts erected along the shore of Cobb Island. The above message was immediately received by his assistant Alfred Thiessen. . . . — — Map (db m245531) HM |